Merge pull request #6480 from KDSBrowne/2.2-ui-improvments-01

...ml5/imports/ui/components/chat/message-form/component.jsx

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

...ebutton-html5/imports/ui/components/tooltip/component.jsx

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

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

bigbluebutton-html5/private/locales/en.json