feat: Moving documents via drag and drop in sidebar (#1717)

* wip: added some basic drag and drop UI for combining items

* refactor: pathToDocument to accept only id

* fix: Multiple drop backends error
fix: Incorrect styling dragging over active collection
fix: Stay in disabled state until save is complete

* Improving display while moving doc

* fix: update by user should be changed when moving a doc

* add move guard to drag

Co-authored-by: Tom Moor <tom.moor@gmail.com>

package.json

@@ -137,6 +137,8 @@
     "react-autosize-textarea": "^6.0.0",
     "react-avatar-editor": "^10.3.0",
     "react-color": "^2.17.3",
+    "react-dnd": "^11.1.3",
+    "react-dnd-html5-backend": "^11.1.3",
     "react-dom": "^16.8.6",
     "react-dropzone": "^11.2.4",
     "react-helmet": "^5.2.0",