7. History-tracking, so that if users go to different talks and then click "back" button in browser they go back to previous talk, and not to previous browser page, which would usually kick them out of the Messenger (because it's a single-page-app with same URL for all states).

8. Inline playback for Audio attachments.

9. Fixes and improvements, especially in message editing and message action menu

10. Switched to FontAwesome for icons to be consistent with the rest of the site.