Add missing sidebar toggle icon on activity page.
Fix collaborator notification message.
Update card comments count for user that added/deleted the comment.
Fix style issues when navigation from “Boards” to “Activity”.
Track route changes.
Merge branch 'dev'

* dev:
  Track route changes.
  Fix style issues when navigation from “Boards” to “Activity”.
  Update card comments count for user that added/deleted the comment.
  Fix collaborator notification message.
  Add missing sidebar toggle icon on activity page.