Merge pull request #4832 from KDSBrowne/x.0.3-fix-console-warnings

.../ui/components/actions-bar/actions-dropdown/component.jsx

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

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

...n-html5/imports/ui/components/dropdown/list/component.jsx

...5/imports/ui/components/logout-confirmation/component.jsx

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

...ser-participants/user-list-item/user-action/component.jsx

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