Minor layout update for breakout rooms

 Fixes #3196

  Fix issue 3204

 End the breakout rooms when the parent meeting is ended from the API.

  - Need to pass sessionToken to get stuns for webrtc call.

bbb-web: added updateRecordings to the API

 Add help on how to use new screenshare

 Provide a way for users to learn how to use the new screen share as
 the steps to launch it differs depending on OS and browser.

Add HTTPS support to screenshare webstart app

Bbb web fix max participants by tracking joins

Remove unused scala code

HTML5 - Improvements to Chat. Closes #3207

Minor fixes

Update on user avatar and user item

when force=false or not included
if meta_parameter exists and passed meta_parameter='' update to blank
if meta_parameter does not exists and passed meta_parameter!='' do nothing

when force=true
if meta_parameter exists and passed meta_parameter='' delete
if meta_parameter does not exists and passed meta_parameter!='' add it

* master:
  Hide webcam component

Merge branch 'master' of https://github.com/bigbluebutton/bigbluebutton into bbb-web_fix-maxParticipants-by-tracking-joins-II

Merge branch 'master' of github.com:jfederico/bigbluebutton into bbb-web_fix-maxParticipants-by-tracking-joins-II

Hide webcam component