fix reported bugs / impliment suggested changes

...utton-html5/imports/ui/components/actions-bar/styles.scss

...button-html5/imports/ui/components/dropdown/component.jsx

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

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

...st-content/user-participants/user-list-item/component.jsx

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

...rticipants/user-list-item/user-list-content/component.jsx

bigbluebutton-html5/imports/utils/statuses.js