Minor updates for detecting CentOS installation

Presenter multi user wb toogle

   for other users appears instead of just the presenter's cursor.

 - fix issue where we cannot start breakout rooms again when the firs…

[HTML5 2.0] Fix Audio Modal on Meeting Join

[HTML5] - Meeting title fix

Merge branch '2x-client-theme' of https://github.com/riadvice/bigbluebutton into riadvice-2x-client-theme

[HTML5 2.0] Fix breakout on the HTML5

Merge branch '2x-client-theme' of https://github.com/riadvice/bigbluebutton into riadvice-2x-client-theme

Bbb 20 rec fixes

Visually disable user selection in users list. (reverted from commit 09ed1ba6)

The previous code would cause shapes to "blink" during updating if
the updates weren't continuous - in a gap between updates, the shape
would disappear.

Rework the logic for looking up "current" shapes to return the
nearest previous update rather than only exact matching timestamps,
and simplify the logic that decides whether to make a shape visible
or hidden.

[HTML5 2.0] Handling Separate Redis Channel

Merge branch 'audio-state' of https://github.com/antobinary/bigbluebutton into antobinary-audio-state

Merge branch '2x-client-theme' of https://github.com/riadvice/bigbluebutton into riadvice-2x-client-theme