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/styles/animations.js

@@ -12,3 +12,9 @@ export const fadeAndScaleIn = keyframes`
     transform: scale(1);
   }
 `;
+
+export const pulsate = keyframes`
+  0% { opacity: 1; }
+  50% { opacity: 0.5; }
+  100% { opacity: 1; }
+`;