Various commenting improvements (#4938)

* fix: New threads attached to previous as replies

* fix: Cannot use floating toolbar properly in comments

* perf: Avoid re-writing history on click in editor

* fix: Comment on text selection

* fix: 'Copy link' on comments uses wrong hostname

* Show comment buttons on input focus rather than non-empty input
Increase maximum sidebar size

* Allow opening comments from document menu

* fix: Clicking comment menu should not focus thread

shared/i18n/locales/en_US/translation.json

@@ -52,6 +52,7 @@
   "Delete {{ documentName }}": "Delete {{ documentName }}",
   "Permanently delete": "Permanently delete",
   "Permanently delete {{ documentName }}": "Permanently delete {{ documentName }}",
+  "Comments": "Comments",
   "History": "History",
   "Insights": "Insights",
   "Home": "Home",
@@ -436,10 +437,9 @@
   "Error creating comment": "Error creating comment",
   "Add a comment": "Add a comment",
   "Add a reply": "Add a reply",
-  "Post": "Post",
   "Reply": "Reply",
+  "Post": "Post",
   "Cancel": "Cancel",
-  "Comments": "Comments",
   "No comments yet": "No comments yet",
   "Error updating comment": "Error updating comment",
   "Document updated by {{userName}}": "Document updated by {{userName}}",
@@ -476,7 +476,7 @@
   "{{ count }} words selected_plural": "{{ count }} words selected",
   "{{ count }} characters selected": "{{ count }} character selected",
   "{{ count }} characters selected_plural": "{{ count }} characters selected",
-  "Collaborators": "Collaborators",
+  "Contributors": "Contributors",
   "Created": "Created",
   "Last updated": "Last updated",
   "Creator": "Creator",