Cleanup, linting, fixed css modules' imports

...api/captions/server/modifiers/updateCaptionsCollection.js

...ports/api/slides/server/modifiers/addSlideToCollection.js

bigbluebutton-html5/imports/startup/server/index.js

...ton-html5/imports/ui/components/actions-bar/component.jsx

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

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

...chat/message-list/message-list-item/message/component.jsx

...html5/imports/ui/components/closed-captions/component.jsx

...html5/imports/ui/components/notifications-bar/styles.scss

...ton-html5/imports/ui/components/user-avatar/component.jsx

...ports/ui/components/whiteboard/slide-controls/styles.scss

bigbluebutton-html5/package.json