* When JWT tokens are used to join the chat and the username conflicts:
instead of renaming the new user to add a "2" it will disconnect the
original login (sending a message that they have signed in somewhere
else and are logged out now)
* When disconnected the text entry box will be greyed out.
* Improvements for the mobile user experience: if you're viewing the
chat history panel and have unread messages or DMs, a number indicator
appears on the channels button. It is grey for public channel messages
or red if any of them are DMs
* Fix the emoji picker drop-down on the first messages of a DM thread
Noah Petherbridge
75c7511410