Cleanup

Make the CC updates smarter

 Joining voice conf of breakout room

 A moderator should be able to listen-in on the breakout room. During a previous merge, the
 handler of the transfer message in FSESL was accidentally removed. The user isn't able to
 the breakout room's voice conference anymore.

Fixes login in html when flash is not supported

 Remove unneeded code which is part of the old desktop sharing.

bbb-web: Fix for issue #2960

 Screenshare help page

 Help page with link to videos.

 Add placeholder for screenshare help page.

Fix screenshare autoreconnect. Fixes issue #3252

 Format code properly by fixing indents and line endings.

  Handle auto-reconnect when user is sharing screen and when user is viewing screen.

 Reformat code by running dos2unix.

Update bbb-conf for new systemd bbb-record-core jobs

Recording captions

Remove reference to deleted file

Improve meeting retrieval in MeetingService

Merge branch 'improve-meeting-retrieval' of https://github.com/riadvice/bigbluebutton into riadvice-improve-meeting-retrieval