Merge pull request #5206 from riadvice/mobile-listen-only

clients/flash/air-client/src/Default.css

clients/flash/air-client/src/css/hdpi.css

clients/flash/air-client/src/css/ldpi.css

clients/flash/air-client/src/css/mdpi.css

clients/flash/air-client/src/css/xhdpi.css

clients/flash/air-client/src/css/xxhdpi.css

clients/flash/air-client/src/css/xxxhdpi.css

...h/air-client/src/org/bigbluebutton/air/common/PageEnum.as

...c/org/bigbluebutton/air/main/views/MenuButtonsMediator.as

...air-client/src/org/bigbluebutton/air/voice/VoiceConfig.as

...org/bigbluebutton/air/voice/views/EchoTestViewMediator.as

...nt/src/org/bigbluebutton/air/voice/views/JoinAudioView.as

...rg/bigbluebutton/air/voice/views/JoinAudioViewMediator.as