Merge branch 'v2.0.x-release' of https://github.com/bigbluebutton/bigbluebutton into orientation-recording

Disable yes button on echo-test when clicked.

RaP: Workaround broken seeking in flv after red5 update.

Whiteboard and Cursor performance update

Since the update to the newer red5, seeking in flv files (webcams in
particular are noticable) has been broken, resulting in cameras
appearing to "hang" any time there is a cut in the generated video -
which happens when start/stop button is pushed, or when cameras are
added or removed.

We can detect the problematic video files because the timestamp of the
first frame is large (old red5 versions always set first frame
timestamp to 0.001 seconds). If we see a file like this, having ffmpeg
remux the file - rewriting the timestamps and index - works around the
problem.

Update toast style

User list UI changes implemented

[html5] Better video pausing, connection, re-connecting and stability

Improve userlist dropdown menu key-board functionality

Toast message into Flash client

Tweak an iOS string for Chrome

Revert special api changes made for html5 client

Warning modal now displays for iOS Chrome users

Merge branch 'v2.0.x-release' of https://github.com/bigbluebutton/bigbluebutton into better-video-stability

Use GetRecordingStatus message to start recordings from the bbb-webrtc-sfu side

User list fixed to display all users

WIP | Use streams to cursor and optimistic updates

WIP | Use streamss to whiteboard and optimistic updates

WIP | Remove fake delay

Add two way batching (server/client client/server)

Fix null userId exception and remove logs

wip

Add two way batching (server/client client/server) for cursor

Remove message frequency from draw-listeners component since we handle on message publication

Handle clear and undo messages