HTML5 - changed divider of recorded icon

Avoid converting some pptx files with certain properties and inform the user.

Link "enableEmojiStatus" enabled/disabled to the emoji button.

initialize html5StunTurn properly - complication from PR 3628

bbb-lti: Fix for issue #3595

fix bug preventing stun/turn call. Fixes #3627

Audio Error notification

Add Transaprent Base for Audio Modal only

Mute button glow indicator

html5client: Improve on actions and permissions

recording: Run the 'ser' fixup tool on deskshare videos, too

 Handle exception when sending message to client

 Handle exceptions properly when sending message to client. We were not handling the
 exception so when it occured, the thread stopped and we can't send messages from
 server to client anymore.

Fixed userlist and chat scrolling in Firefox

bbb-conf now recommends editing external.xml if FreeSWITCH is listening to 5066 with SSL enabled 

bbb-conf --check warns you if you have SSL configured by still have FreeSWITCH listening on port 5066