Fix private chat for viewers and allow private chat with moderators

Mute shared video when echo test is open.

Improve talking indicators in edge

Fix the issue with videos overlapping whiteboard

Prep 2.2

Fix links in welcome message

Fullscreen in Edge

Quick poll implement

Improve shared notes accessibility

Exclude dial in users from polls

[HTML5] Change default resolution for webcams to 320x240

- This was done to mitigate packet loss and flickering and better abide to our default configured bitrate (300kbps).
This goes alongside updates to bbb-webrtc-sfu and kurento-media-server to increase reliablity and diminish stream artifacts.
I'll probably revisit this resolution change once I can correctly identify the source of corrupted frames, but I really think we should
maintain this as 320x240 for the time being. 640x480 would only be feasible if we increased our default bitrate config to 500kbps.

Fix text overflow in error screen button.

Preserve original capitalization of username in fullscreen button.

Restore quick polling in Flash

Fix mute all users option

Client logger on feedback

Recording: Remove the red5 race workaround that delays processing

This was added to workaround for red5 taking a while to rewrite the
serialized (.ser) data that it streams to disk back to the .flv format.

The workaround is no longer needed, for two reasons:
* The sanity scripts run the red5 code to generate the .flv from the .ser
  if needed, and
* We're expecting more people to be using WebRTC media in the future anyways

This makes recordings available up to 2 minutes earlier than they would have
been otherwise.

Fix breakout room items don't appearing

Recording archive: log when events are are out of order and must be sorted

To help us track down exactly why this is happening - and know when we've
properly fixed it - add some logging.