Merge pull request #3795 from riadvice/webrtc-quality

...uebutton-client/branding/default/style/css/BBBDefault.css

...lt/style/css/assets/images/almost_strong_audio_status.png

...ault/style/css/assets/images/almost_weak_audio_status.png

...g/default/style/css/assets/images/strong_audio_status.png

...ing/default/style/css/assets/images/weak_audio_status.png

bigbluebutton-client/locale/en_US/bbbResources.properties

bigbluebutton-client/resources/config.xml.template

bigbluebutton-client/resources/prod/BigBlueButton.html

bigbluebutton-client/resources/prod/lib/adapter.js

bigbluebutton-client/resources/prod/lib/bbb_api_bridge.js

...button-client/resources/prod/lib/bbb_webrtc_bridge_sip.js

bigbluebutton-client/resources/prod/lib/getStats.js

...uebutton-client/resources/prod/lib/webrtc_stats_bridge.js

...nt/src/org/bigbluebutton/main/api/ExternalApiCallbacks.as

...tton-client/src/org/bigbluebutton/main/events/BBBEvent.as

...-client/src/org/bigbluebutton/main/views/MainToolbar.mxml

...t/src/org/bigbluebutton/main/views/WebRTCAudioStatus.mxml

...lient/src/org/bigbluebutton/modules/phone/PhoneOptions.as