Add user list item and panel

bigbluebutton-html5/imports/startup/client/routes.js

...n-html5/imports/ui/components/Breakout-room/component.jsx

...ton-html5/imports/ui/components/Breakout-room/styles.scss

...components/actions-bar/create-breakout-room/component.jsx

bigbluebutton-html5/imports/ui/components/app/component.jsx

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

...utton-html5/imports/ui/components/user-list/component.jsx

...utton-html5/imports/ui/components/user-list/container.jsx

...uebutton-html5/imports/ui/components/user-list/service.js

...s/user-list/user-list-content/breakout-room/component.jsx

...nts/user-list/user-list-content/breakout-room/styles.scss

...s/ui/components/user-list/user-list-content/component.jsx

bigbluebutton-html5/private/locales/en.json