Dashboard loading (#142)

* Fixed: Loading indicator never appears
Added: Loading indicator to dashboard when loading first results

* Less assumptions

* Fixes: Image uploads not working

* Fixes #136 - Keyboard shortcuts should work when editor is not focused

* Allow images to be dragged anywhere on document editor

* Fixes #137 - vertical alignment

* Restore shortcuts with editor focus

* Restore 'e' to edit current document
Fixed up ? to open keyboard shortcuts

* wip

* LoadinglistPlaceholder

* WIP

* Refactor

* DRY logic

frontend/components/LoadingIndicator/LoadingIndicatorBar.js

@@ -21,9 +21,10 @@ const Container = styled.div`
   z-index: 9999;
 
   background-color: #03A9F4;
-  width: 0;
+  width: 100%;
   animation: ${loadingFrame} 4s ease-in-out infinite;
   animation-delay: 250ms;
+  margin-left: -100%;
 `;
 
 const Loader = styled.div`