feat: Add group by to collection view (Issue 3614) (#4486)

packages/netlify-cms-locales/src/en/index.js

@@ -47,6 +47,7 @@ const en = {
       searchResults: 'Search Results for "%{searchTerm}"',
       searchResultsInCollection: 'Search Results for "%{searchTerm}" in %{collection}',
       filterBy: 'Filter by',
+      groupBy: 'Group by',
     },
     entries: {
       loadingEntries: 'Loading Entries...',
@@ -54,6 +55,10 @@ const en = {
       longerLoading: 'This might take several minutes',
       noEntries: 'No Entries',
     },
+    groups: {
+      other: 'Other',
+      negateLabel: 'Not %{label}',
+    },
     defaultFields: {
       author: {
         label: 'Author',