Merge remote-tracking branch 'upstream/v2.0.x-release' into audio-refactor-bugfixes

bigbluebutton-client/src/org/bigbluebutton/core/PopUpUtil.as

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

.../bigbluebutton/modules/present/managers/PresentManager.as

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

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

...l5/imports/ui/components/chat/chat-dropdown/component.jsx

...tml5/imports/ui/components/chat/chat-dropdown/styles.scss

...html5/imports/ui/components/chat/message-form/styles.scss

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

...ton-html5/imports/ui/components/dropdown/list/styles.scss

...html5/imports/ui/components/settings/submenus/styles.scss

...utton-html5/imports/ui/components/user-avatar/styles.scss

...mports/ui/components/user-list/chat-list-item/styles.scss

...ebutton-html5/imports/ui/components/user-list/styles.scss

...rts/ui/components/user-list/user-list-content/styles.scss

...s/user-list/user-list-content/user-messages/component.jsx

...nts/user-list/user-list-content/user-messages/styles.scss

...er-list/user-list-content/user-participants/component.jsx

...participants/user-list-item/user-list-content/styles.scss

bigbluebutton-html5/imports/ui/stylesheets/mixins/focus.scss