* Add a History button under the DMs where an authenticated JWT user can page
through the usernames they have stored history with, to bring up those DMs
even if their chat partner is not currently online.
* Try some fixes to the dark video detector to see if it reduces false
positives: wait for the canplaythrough video event to fire before beginning
the dark detection. Also, increase the threshold so dark frames need to be
seen 5 times in a row instead of twice before cutting the camera.
Noah Petherbridge
74a756d1ef