UI updates (#151)

* infer card title

* Infer entry body & image

* infer image

* Better terminology: EntryListing accept a single Collection

* remove log

* Refactored Collections VO into selectors

* use selectors when showning card

* fixed size cards

* Added 'bio' and 'biography' to collection description inference synonyms

* Removed unused card file

* throw error instance

* bugfix for file based collections

* lint

* moved components with css to own folder

* Search Bugfix: More than one collection might be returned

* Changed sidebar implementation. Closes #104 & #152

* Show spinning loading for unpublished entries

* Refactored Sidebar into a separate container

* Make preview widgets more robust

yarn.lock

@@ -6961,6 +6961,10 @@ react-router@^2.5.1:
     loose-envify "^1.2.0"
     warning "^3.0.0"
 
+react-sidebar:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/react-sidebar/-/react-sidebar-2.2.1.tgz#a8faf6a3c62ddc562c70680d5d016fe9741b585f"
+
 react-simple-di@^1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/react-simple-di/-/react-simple-di-1.2.0.tgz#dde0e5bf689f391ef2ab02c9043b213fe239c6d0"