updates to the audio manager

...uebutton-html5/imports/api/2.0/audio/client/bridge/sip.js

...ml5/imports/ui/components/audio/audio-modal/component.jsx

...ml5/imports/ui/components/audio/audio-modal/container.jsx

...html5/imports/ui/components/audio/audio-modal/styles.scss

.../imports/ui/components/audio/audio-settings/component.jsx

...html5/imports/ui/components/audio/echo-test/component.jsx

...n-html5/imports/ui/components/audio/echo-test/styles.scss

bigbluebutton-html5/imports/ui/components/button/styles.scss

...uebutton-html5/imports/ui/services/audio-manager/index.js

bigbluebutton-html5/private/locales/en.json