Merge branch 'riadvice-breakout-audio-rejoin' into v2.0.x-release

bigbluebutton-client/src/org/bigbluebutton/core/model/Me.as

...nt/src/org/bigbluebutton/main/model/users/BreakoutRoom.as

...rc/org/bigbluebutton/main/views/MainApplicationShell.mxml

...ebutton/modules/phone/views/components/ToolbarButton.mxml

...g/bigbluebutton/modules/users/services/MessageReceiver.as

...luebutton/modules/users/views/JoinBreakoutRoomWindow.mxml