diff --git a/core/dev-test/backends/github/config.yml b/core/dev-test/backends/github/config.yml
index 9a489331..21c1ef09 100644
--- a/core/dev-test/backends/github/config.yml
+++ b/core/dev-test/backends/github/config.yml
@@ -1,10 +1,10 @@
 backend:
   name: github
-  branch: master
-  repo: owner/repo
+  branch: main
+  repo: staticjscms/static-cms-github
 
-media_folder: static/media
-public_folder: /media
+media_folder: assets/upload
+public_folder: /assets/upload
 collections:
   - name: posts
     label: Posts
diff --git a/core/package.json b/core/package.json
index d6ed46ea..82eab2b3 100644
--- a/core/package.json
+++ b/core/package.json
@@ -102,7 +102,6 @@
     "react-router-dom": "6.4.1",
     "react-scroll-sync": "0.9.0",
     "react-sortable-hoc": "2.0.0",
-    "react-split-pane": "0.1.92",
     "react-textarea-autosize": "8.3.4",
     "react-topbar-progress-indicator": "4.1.1",
     "react-virtualized-auto-sizer": "1.0.7",
diff --git a/core/src/backend.ts b/core/src/backend.ts
index 7de38136..4eb89b80 100644
--- a/core/src/backend.ts
+++ b/core/src/backend.ts
@@ -767,7 +767,8 @@ export class Backend {
         }
         return Object.assign(entry, { data: isError(data) ? {} : data });
       }
-      return format.fromFile(entry);
+
+      return entry;
     };
   }
 
@@ -967,7 +968,7 @@ export class Backend {
     const format = resolveFormat(collection, entry);
     const fieldsOrder = this.fieldsOrder(collection, entry);
     const fieldsComments = selectFieldsComments(collection, entry);
-    return format && format.toFile(entry.data, fieldsOrder, fieldsComments);
+    return format ? format.toFile(entry.data ?? {}, fieldsOrder, fieldsComments) : '';
   }
 
   fieldsOrder(collection: Collection, entry: Entry) {
diff --git a/core/src/components/App/App.tsx b/core/src/components/App/App.tsx
index e781771c..23b14de6 100644
--- a/core/src/components/App/App.tsx
+++ b/core/src/components/App/App.tsx
@@ -4,11 +4,12 @@ import { styled } from '@mui/material/styles';
 import React, { useCallback, useMemo } from 'react';
 import { translate } from 'react-polyglot';
 import { connect } from 'react-redux';
-import { Navigate, Route, Routes, useParams } from 'react-router-dom';
+import { Navigate, Route, Routes, useLocation, useParams } from 'react-router-dom';
 import { ScrollSync } from 'react-scroll-sync';
 import TopBarProgress from 'react-topbar-progress-indicator';
 
 import { loginUser as loginUserAction } from '../../actions/auth';
+import { discardDraft as discardDraftAction } from '../../actions/entries';
 import { currentBackend } from '../../backend';
 import { colors, GlobalStyles } from '../../components/UI/styles';
 import { history } from '../../routing/history';
@@ -26,6 +27,7 @@ import type { ComponentType } from 'react';
 import type { ConnectedProps } from 'react-redux';
 import type { Collections, Credentials, TranslatedProps } from '../../interface';
 import type { RootState } from '../../store';
+
 TopBarProgress.config({
   barColors: {
     0: colors.active,
@@ -91,6 +93,7 @@ const App = ({
   useMediaLibrary,
   t,
   scrollSyncEnabled,
+  discardDraft,
 }: TranslatedProps<AppProps>) => {
   const configError = useCallback(
     (error?: string) => {
@@ -157,6 +160,14 @@ const App = ({
 
   const defaultPath = useMemo(() => getDefaultPath(collections), [collections]);
 
+  const { pathname } = useLocation();
+  React.useEffect(() => {
+    if (!/\/collections\/[a-zA-Z0-9_-]+\/entries\/[a-zA-Z0-9_-]+/g.test(pathname)) {
+      discardDraft();
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [pathname]);
+
   const content = useMemo(() => {
     if (!user) {
       return authenticationPage;
@@ -264,6 +275,7 @@ function mapStateToProps(state: RootState) {
 
 const mapDispatchToProps = {
   loginUser: loginUserAction,
+  discardDraft: discardDraftAction,
 };
 
 const connector = connect(mapStateToProps, mapDispatchToProps);
diff --git a/core/src/components/Editor/Editor.tsx b/core/src/components/Editor/Editor.tsx
index 11fd85ca..135a9dd2 100644
--- a/core/src/components/Editor/Editor.tsx
+++ b/core/src/components/Editor/Editor.tsx
@@ -75,7 +75,8 @@ const Editor = ({
       debounce(function (entry: Entry, collection: Collection) {
         persistLocalBackup(entry, collection);
       }, 2000),
-    [persistLocalBackup],
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+    [],
   );
 
   const deleteBackup = useCallback(() => {
@@ -84,7 +85,8 @@ const Editor = ({
       deleteLocalBackup(collection, slug);
     }
     deleteDraftLocalBackup();
-  }, [collection, createBackup, deleteDraftLocalBackup, deleteLocalBackup, slug]);
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [collection, createBackup, slug]);
 
   const [submitted, setSubmitted] = useState(false);
   const handlePersistEntry = useCallback(
@@ -195,14 +197,12 @@ const Editor = ({
   useEffect(() => {
     if (hasChanged && entryDraft.entry) {
       createBackup(entryDraft.entry, collection);
-    } else if (localBackup) {
-      deleteBackup();
     }
 
     return () => {
       createBackup.flush();
     };
-  }, [collection, createBackup, deleteBackup, entryDraft.entry, hasChanged, localBackup]);
+  }, [collection, createBackup, entryDraft.entry, hasChanged]);
 
   const [prevCollection, setPrevCollection] = useState<Collection | null>(null);
   const [preSlug, setPrevSlug] = useState<string | undefined | null>(null);
@@ -280,11 +280,6 @@ const Editor = ({
     };
   }, [collection.name, deleteBackup, discardDraft, navigationBlocker]);
 
-  // TODO Is this needed?
-  //   if (!collectionEntriesLoaded) {
-  //     loadEntries(collection);
-  //   }
-
   if (entry && entry.error) {
     return (
       <div>
diff --git a/core/src/components/Editor/EditorControlPane/EditorControl.tsx b/core/src/components/Editor/EditorControlPane/EditorControl.tsx
index ec555f35..3c2fefe5 100644
--- a/core/src/components/Editor/EditorControlPane/EditorControl.tsx
+++ b/core/src/components/Editor/EditorControlPane/EditorControl.tsx
@@ -117,7 +117,7 @@ interface ControlHintProps {
   $error: boolean;
 }
 
-export const ControlHint = styled(
+const ControlHint = styled(
   'p',
   transientOptions,
 )<ControlHintProps>(
diff --git a/core/src/components/Editor/EditorPreviewPane/EditorPreviewPane.tsx b/core/src/components/Editor/EditorPreviewPane/EditorPreviewPane.tsx
index 7579fa36..d9ae5ace 100644
--- a/core/src/components/Editor/EditorPreviewPane/EditorPreviewPane.tsx
+++ b/core/src/components/Editor/EditorPreviewPane/EditorPreviewPane.tsx
@@ -94,6 +94,7 @@ function getWidgetFor(
   getAsset: GetAssetFunction,
   widgetFields: Field[] = fields,
   values: EntryData = entry.data,
+  idx: number | null = null,
 ): ReactNode {
   // We retrieve the field by name so that this function can also be used in
   // custom preview templates, where the field object can't be passed in.
@@ -157,7 +158,7 @@ function getWidgetFor(
     value.toString().length < 50
   ) {
     renderedValue = (
-      <div>
+      <div key={field.name}>
         <>
           <strong>{field.label ?? field.name}:</strong> {value}
         </>
@@ -165,7 +166,7 @@ function getWidgetFor(
     );
   }
   return renderedValue
-    ? getWidget(config, fieldWithWidgets, collection, renderedValue, entry, getAsset)
+    ? getWidget(config, fieldWithWidgets, collection, renderedValue, entry, getAsset, idx)
     : null;
 }
 
@@ -237,6 +238,7 @@ function widgetsForNestedFields(
   getAsset: GetAssetFunction,
   widgetFields: Field[],
   values: EntryData,
+  idx: number | null = null,
 ) {
   return widgetFields
     .map(field =>
@@ -250,6 +252,7 @@ function widgetsForNestedFields(
         getAsset,
         widgetFields,
         values,
+        idx,
       ),
     )
     .filter(widget => Boolean(widget)) as JSX.Element[];
@@ -283,6 +286,7 @@ function getTypedNestedWidgets(
         getAsset,
         itemType.fields,
         value,
+        index,
       );
     })
     .filter(Boolean);
diff --git a/core/src/formats/FileFormatter.ts b/core/src/formats/FileFormatter.ts
new file mode 100644
index 00000000..5adea6f3
--- /dev/null
+++ b/core/src/formats/FileFormatter.ts
@@ -0,0 +1,8 @@
+export abstract class FileFormatter {
+  abstract fromFile(content: string): object;
+  abstract toFile(
+    data: object,
+    sortedKeys?: string[],
+    comments?: Record<string, string>,
+  ): string;
+}
diff --git a/core/src/formats/JsonFormatter.ts b/core/src/formats/JsonFormatter.ts
new file mode 100644
index 00000000..4c684a0d
--- /dev/null
+++ b/core/src/formats/JsonFormatter.ts
@@ -0,0 +1,13 @@
+import { FileFormatter } from './FileFormatter';
+
+class JsonFormatter extends FileFormatter {
+  fromFile(content: string) {
+    return JSON.parse(content);
+  }
+
+  toFile(data: object) {
+    return JSON.stringify(data, null, 2);
+  }
+}
+
+export default new JsonFormatter();
diff --git a/core/src/formats/toml.ts b/core/src/formats/TomlFormatter.ts
similarity index 72%
rename from core/src/formats/toml.ts
rename to core/src/formats/TomlFormatter.ts
index a1b8a141..6d05bfb9 100644
--- a/core/src/formats/toml.ts
+++ b/core/src/formats/TomlFormatter.ts
@@ -1,9 +1,10 @@
 import toml from '@iarna/toml';
-import tomlify from 'tomlify-j0.4';
 import moment from 'moment';
+import tomlify from 'tomlify-j0.4';
 
 import AssetProxy from '../valueObjects/AssetProxy';
 import { sortKeys } from './helpers';
+import { FileFormatter } from './FileFormatter';
 
 function outputReplacer(_key: string, value: unknown) {
   if (moment.isMoment(value)) {
@@ -22,12 +23,14 @@ function outputReplacer(_key: string, value: unknown) {
   return false;
 }
 
-export default {
+class TomlFormatter extends FileFormatter {
   fromFile(content: string) {
     return toml.parse(content);
-  },
+  }
 
-  toFile(data: object, sortedKeys: string[] = []) {
-    return tomlify.toToml(data, { replace: outputReplacer, sort: sortKeys(sortedKeys) });
-  },
-};
+  toFile(data: object, sortedKeys: string[] = []): string {
+    return tomlify.toToml(data as object, { replace: outputReplacer, sort: sortKeys(sortedKeys) });
+  }
+}
+
+export default new TomlFormatter();
diff --git a/core/src/formats/yaml.ts b/core/src/formats/YamlFormatter.ts
similarity index 89%
rename from core/src/formats/yaml.ts
rename to core/src/formats/YamlFormatter.ts
index 3d6004f3..086597a2 100644
--- a/core/src/formats/yaml.ts
+++ b/core/src/formats/YamlFormatter.ts
@@ -1,6 +1,7 @@
 import yaml from 'yaml';
 
 import { sortKeys } from './helpers';
+import { FileFormatter } from './FileFormatter';
 
 import type { Pair, YAMLMap, YAMLSeq } from 'yaml/types';
 
@@ -20,13 +21,13 @@ function addComments(items: Array<Pair>, comments: Record<string, string>, prefi
   });
 }
 
-export default {
+class YamlFormatter extends FileFormatter {
   fromFile(content: string) {
     if (content && content.trim().endsWith('---')) {
       content = content.trim().slice(0, -3);
     }
     return yaml.parse(content);
-  },
+  }
 
   toFile(data: object, sortedKeys: string[] = [], comments: Record<string, string> = {}) {
     const contents = yaml.createNode(data) as YAMLMap | YAMLSeq;
@@ -38,5 +39,7 @@ export default {
     doc.contents = contents;
 
     return doc.toString();
-  },
-};
+  }
+}
+
+export default new YamlFormatter();
diff --git a/core/src/formats/formats.ts b/core/src/formats/formats.ts
index 8202675b..d64acc05 100644
--- a/core/src/formats/formats.ts
+++ b/core/src/formats/formats.ts
@@ -1,12 +1,11 @@
-import get from 'lodash/get';
-
-import yamlFormatter from './yaml';
-import tomlFormatter from './toml';
-import jsonFormatter from './json';
+import YamlFormatter from './YamlFormatter';
+import TomlFormatter from './TomlFormatter';
+import JsonFormatter from './JsonFormatter';
 import { FrontmatterInfer, frontmatterJSON, frontmatterTOML, frontmatterYAML } from './frontmatter';
 
 import type { Delimiter } from './frontmatter';
 import type { Collection, Entry, Format } from '../interface';
+import type { FileFormatter } from './FileFormatter';
 
 export const frontmatterFormats = ['yaml-frontmatter', 'toml-frontmatter', 'json-frontmatter'];
 
@@ -21,30 +20,32 @@ export const formatExtensions = {
   'yaml-frontmatter': 'md',
 };
 
-export const extensionFormatters = {
-  yml: yamlFormatter,
-  yaml: yamlFormatter,
-  toml: tomlFormatter,
-  json: jsonFormatter,
+export const extensionFormatters: Record<string, FileFormatter> = {
+  yml: YamlFormatter,
+  yaml: YamlFormatter,
+  toml: TomlFormatter,
+  json: JsonFormatter,
   md: FrontmatterInfer,
   markdown: FrontmatterInfer,
   html: FrontmatterInfer,
 };
 
-function formatByName(name: Format, customDelimiter?: Delimiter) {
-  return {
-    yml: yamlFormatter,
-    yaml: yamlFormatter,
-    toml: tomlFormatter,
-    json: jsonFormatter,
+function formatByName(name: Format, customDelimiter?: Delimiter): FileFormatter {
+  const fileFormatter: Record<string, FileFormatter> = {
+    yml: YamlFormatter,
+    yaml: YamlFormatter,
+    toml: TomlFormatter,
+    json: JsonFormatter,
     frontmatter: FrontmatterInfer,
     'json-frontmatter': frontmatterJSON(customDelimiter),
     'toml-frontmatter': frontmatterTOML(customDelimiter),
     'yaml-frontmatter': frontmatterYAML(customDelimiter),
-  }[name];
+  };
+
+  return fileFormatter[name];
 }
 
-export function resolveFormat(collection: Collection, entry: Entry) {
+export function resolveFormat(collection: Collection, entry: Entry): FileFormatter | undefined {
   // Check for custom delimiter
   const frontmatter_delimiter = collection.frontmatter_delimiter;
 
@@ -59,7 +60,7 @@ export function resolveFormat(collection: Collection, entry: Entry) {
   if (filePath) {
     const fileExtension = filePath.split('.').pop();
     if (fileExtension) {
-      return get(extensionFormatters, fileExtension);
+      return extensionFormatters[fileExtension];
     }
   }
 
@@ -67,7 +68,7 @@ export function resolveFormat(collection: Collection, entry: Entry) {
   //   collection config, infer the format from that extension.
   const extension = collection.extension;
   if (extension) {
-    return get(extensionFormatters, extension);
+    return extensionFormatters[extension];
   }
 
   // If no format is specified and it cannot be inferred, return the default.
diff --git a/core/src/formats/frontmatter.ts b/core/src/formats/frontmatter.ts
index 5f9fa775..71c7f3ae 100644
--- a/core/src/formats/frontmatter.ts
+++ b/core/src/formats/frontmatter.ts
@@ -1,8 +1,9 @@
 import matter from 'gray-matter';
 
-import tomlFormatter from './toml';
-import yamlFormatter from './yaml';
-import jsonFormatter from './json';
+import TomlFormatter from './TomlFormatter';
+import YamlFormatter from './YamlFormatter';
+import JsonFormatter from './JsonFormatter';
+import { FileFormatter } from './FileFormatter';
 
 const Languages = {
   YAML: 'yaml',
@@ -17,10 +18,10 @@ type Format = { language: Language; delimiters: Delimiter };
 
 const parsers = {
   toml: {
-    parse: (input: string) => tomlFormatter.fromFile(input),
+    parse: (input: string) => TomlFormatter.fromFile(input),
     stringify: (metadata: object, opts?: { sortedKeys?: string[] }) => {
       const { sortedKeys } = opts || {};
-      return tomlFormatter.toFile(metadata, sortedKeys);
+      return TomlFormatter.toFile(metadata, sortedKeys);
     },
   },
   json: {
@@ -30,10 +31,10 @@ const parsers = {
       if (JSONinput.slice(0, 1) !== '{') {
         JSONinput = '{' + JSONinput + '}';
       }
-      return jsonFormatter.fromFile(JSONinput);
+      return JsonFormatter.fromFile(JSONinput);
     },
     stringify: (metadata: object) => {
-      let JSONoutput = jsonFormatter.toFile(metadata).trim();
+      let JSONoutput = JsonFormatter.toFile(metadata).trim();
       // Trim leading and trailing brackets.
       if (JSONoutput.slice(0, 1) === '{' && JSONoutput.slice(-1) === '}') {
         JSONoutput = JSONoutput.slice(1, -1);
@@ -42,13 +43,13 @@ const parsers = {
     },
   },
   yaml: {
-    parse: (input: string) => yamlFormatter.fromFile(input),
+    parse: (input: string) => YamlFormatter.fromFile(input),
     stringify: (
       metadata: object,
       opts?: { sortedKeys?: string[]; comments?: Record<string, string> },
     ) => {
       const { sortedKeys, comments } = opts || {};
-      return yamlFormatter.toFile(metadata, sortedKeys, comments);
+      return YamlFormatter.toFile(metadata, sortedKeys, comments);
     },
   },
 };
@@ -91,10 +92,11 @@ export function getFormatOpts(format?: Language, customDelimiter?: Delimiter) {
   };
 }
 
-export class FrontmatterFormatter {
+export class FrontmatterFormatter extends FileFormatter {
   format?: Format;
 
   constructor(format?: Language, customDelimiter?: Delimiter) {
+    super();
     this.format = getFormatOpts(format, customDelimiter);
   }
 
diff --git a/core/src/formats/json.ts b/core/src/formats/json.ts
deleted file mode 100644
index 518f85d4..00000000
--- a/core/src/formats/json.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-export default {
-  fromFile(content: string) {
-    return JSON.parse(content);
-  },
-
-  toFile(data: object) {
-    return JSON.stringify(data, null, 2);
-  },
-};
diff --git a/core/src/interface.ts b/core/src/interface.ts
index d3462974..176078fd 100644
--- a/core/src/interface.ts
+++ b/core/src/interface.ts
@@ -75,13 +75,13 @@ export type ValueOrNestedValue =
 
 export type EntryData = ObjectValue | undefined | null;
 
-export interface Entry {
+export interface Entry<T = ObjectValue> {
   collection: string;
   slug: string;
   path: string;
   partial: boolean;
   raw: string;
-  data: EntryData;
+  data: T | undefined | null;
   label: string | null;
   isModification: boolean | null;
   mediaFiles: MediaFile[];
@@ -277,10 +277,10 @@ export type WidgetPreviewComponent<T = unknown, F extends Field = Field> =
   | React.ReactElement<unknown, string | React.JSXElementConstructor<any>>
   | ComponentType<WidgetPreviewProps<T, F>>;
 
-export interface TemplatePreviewProps {
+export interface TemplatePreviewProps<T = unknown> {
   collection: Collection;
   fields: Field[];
-  entry: Entry;
+  entry: Entry<T>;
   document: Document | undefined | null;
   window: Window | undefined | null;
   getAsset: GetAssetFunction;
diff --git a/core/src/reducers/entryDraft.ts b/core/src/reducers/entryDraft.ts
index 924eff20..5fe2f74d 100644
--- a/core/src/reducers/entryDraft.ts
+++ b/core/src/reducers/entryDraft.ts
@@ -49,7 +49,6 @@ function entryDraftReducer(
   switch (action.type) {
     case DRAFT_CREATE_FROM_ENTRY: {
       const newState = { ...state };
-      delete newState.localBackup;
 
       // Existing Entry
       return {
diff --git a/core/src/widgets/markdown/MarkdownControl.tsx b/core/src/widgets/markdown/MarkdownControl.tsx
index febc5544..e0faebd1 100644
--- a/core/src/widgets/markdown/MarkdownControl.tsx
+++ b/core/src/widgets/markdown/MarkdownControl.tsx
@@ -66,9 +66,11 @@ const MarkdownControl = ({
 
   const handleOnChange = useCallback(() => {
     const newValue = editorRef.current?.getInstance().getMarkdown() ?? '';
-    setInternalValue(newValue);
-    onChange(newValue);
-  }, [editorRef, onChange]);
+    if (newValue !== internalValue) {
+      setInternalValue(newValue);
+      onChange(newValue);
+    }
+  }, [editorRef, internalValue, onChange]);
 
   const handleLabelClick = useCallback(() => {
     editorRef.current?.getInstance().focus();
@@ -151,7 +153,7 @@ const MarkdownControl = ({
 
     addMedia();
     // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [field, mediaPath]);
+  }, [mediaPath]);
 
   const { initialEditType, height, ...markdownEditorOptions } = useEditorOptions();
 
diff --git a/core/src/widgets/markdown/MarkdownPreview.tsx b/core/src/widgets/markdown/MarkdownPreview.tsx
index faffcea0..e73c9e02 100644
--- a/core/src/widgets/markdown/MarkdownPreview.tsx
+++ b/core/src/widgets/markdown/MarkdownPreview.tsx
@@ -19,8 +19,11 @@ const MarkdownPreview = ({
   const mediaHolder = useMemo(() => new MediaHolder(), []);
   const media = useMedia({ value, getAsset, field });
 
+  const viewer = useRef<Viewer | null>(null);
+
   useEffect(() => {
     mediaHolder.setBulkMedia(media);
+    viewer.current?.getInstance().setMarkdown(value ?? '');
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [media]);
 
@@ -31,12 +34,6 @@ const MarkdownPreview = ({
     mode: 'preview',
   });
 
-  const viewer = useRef<Viewer | null>(null);
-
-  useEffect(() => {
-    viewer.current?.getInstance().setMarkdown(value ?? '');
-  }, [value, media]);
-
   return useMemo(() => {
     if (!value) {
       return null;
diff --git a/core/src/widgets/markdown/hooks/useMedia.ts b/core/src/widgets/markdown/hooks/useMedia.ts
index 0335b335..370990f6 100644
--- a/core/src/widgets/markdown/hooks/useMedia.ts
+++ b/core/src/widgets/markdown/hooks/useMedia.ts
@@ -48,7 +48,7 @@ const useMedia = ({ value, getAsset, field }: UseMediaProps) => {
       }
 
       const uniqueMediaToLoad = mediaToLoad.filter(
-        (value, index, self) => self.indexOf(value) === index,
+        (value, index, self) => self.indexOf(value) === index && !(value in media),
       );
 
       for (const url of uniqueMediaToLoad) {
diff --git a/core/src/widgets/relation/RelationControl.tsx b/core/src/widgets/relation/RelationControl.tsx
index dc78f1bd..d20b23cd 100644
--- a/core/src/widgets/relation/RelationControl.tsx
+++ b/core/src/widgets/relation/RelationControl.tsx
@@ -113,6 +113,7 @@ const RelationControl = ({
   query,
   locale,
   label,
+  hasErrors
 }: WidgetControlProps<string | string[], RelationField>) => {
   const [internalValue, setInternalValue] = useState(value);
   const [initialOptions, setInitialOptions] = useState<HitOption[]>([]);
@@ -227,6 +228,7 @@ const RelationControl = ({
           key="relation-control-input"
           {...params}
           label={label}
+          error={hasErrors}
           InputProps={{
             ...params.InputProps,
             endAdornment: (
diff --git a/core/yarn.lock b/core/yarn.lock
index e714f7c7..e097eb12 100644
--- a/core/yarn.lock
+++ b/core/yarn.lock
@@ -7207,7 +7207,7 @@ prompts@^2.0.1:
     kleur "^3.0.3"
     sisteransi "^1.0.5"
 
-prop-types@^15.0.0, prop-types@^15.5.10, prop-types@^15.5.4, prop-types@^15.5.7, prop-types@^15.5.8, prop-types@^15.6.2, prop-types@^15.7.2, prop-types@^15.8.1:
+prop-types@^15.0.0, prop-types@^15.5.10, prop-types@^15.5.7, prop-types@^15.5.8, prop-types@^15.6.2, prop-types@^15.7.2, prop-types@^15.8.1:
   version "15.8.1"
   resolved "https://registry.yarnpkg.com/prop-types/-/prop-types-15.8.1.tgz#67d87bf1a694f48435cf332c24af10214a3140b5"
   integrity sha512-oj87CgZICdulUohogVAR7AjlC0327U4el4L6eAvOqCeudMDVU0NThNaV+b9Df4dXgSP1gXMTnPdhfe/2qDH5cg==
@@ -7458,11 +7458,6 @@ react-is@^16.13.1, react-is@^16.7.0:
   resolved "https://registry.yarnpkg.com/react-is/-/react-is-16.13.1.tgz#789729a4dc36de2999dc156dd6c1d9c18cea56a4"
   integrity sha512-24e6ynE2H+OKt4kqsOvNd8kBpV65zoxbA4BVsEOB3ARVWQki/DHzaUoC5KuON/BiccDaCCTZBuOcfZs70kR8bQ==
 
-react-lifecycles-compat@^3.0.4:
-  version "3.0.4"
-  resolved "https://registry.yarnpkg.com/react-lifecycles-compat/-/react-lifecycles-compat-3.0.4.tgz#4f1a273afdfc8f3488a8c516bfda78f872352362"
-  integrity sha512-fBASbA6LnOU9dOU2eW7aQ8xmYBSXUIWr+UmF9b1efZBazGNO+rcXT/icdKnYm2pTwcRylVUYwW7H1PHfLekVzA==
-
 react-polyglot@0.7.2:
   version "0.7.2"
   resolved "https://registry.yarnpkg.com/react-polyglot/-/react-polyglot-0.7.2.tgz#b0277688c6d26eaff3312774738859cac53a227c"
@@ -7519,22 +7514,6 @@ react-sortable-hoc@2.0.0:
     invariant "^2.2.4"
     prop-types "^15.5.7"
 
-react-split-pane@0.1.92:
-  version "0.1.92"
-  resolved "https://registry.yarnpkg.com/react-split-pane/-/react-split-pane-0.1.92.tgz#68242f72138aed95dd5910eeb9d99822c4fc3a41"
-  integrity sha512-GfXP1xSzLMcLJI5BM36Vh7GgZBpy+U/X0no+VM3fxayv+p1Jly5HpMofZJraeaMl73b3hvlr+N9zJKvLB/uz9w==
-  dependencies:
-    prop-types "^15.7.2"
-    react-lifecycles-compat "^3.0.4"
-    react-style-proptype "^3.2.2"
-
-react-style-proptype@^3.2.2:
-  version "3.2.2"
-  resolved "https://registry.yarnpkg.com/react-style-proptype/-/react-style-proptype-3.2.2.tgz#d8e998e62ce79ec35b087252b90f19f1c33968a0"
-  integrity sha512-ywYLSjNkxKHiZOqNlso9PZByNEY+FTyh3C+7uuziK0xFXu9xzdyfHwg4S9iyiRRoPCR4k2LqaBBsWVmSBwCWYQ==
-  dependencies:
-    prop-types "^15.5.4"
-
 react-svg-core@^3.0.3:
   version "3.0.3"
   resolved "https://registry.yarnpkg.com/react-svg-core/-/react-svg-core-3.0.3.tgz#5d856efeaa4d089b0afeebe885b20b8c9500d162"