Merge remote-tracking branch 'upstream/master' into layout

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

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

...n-html5/imports/ui/components/video-preview/component.jsx

...s/ui/components/video-provider/video-button/component.jsx

...s/video-provider/video-list/video-list-item/component.jsx

...luebutton-html5/public/compatibility/kurento-extension.js

bigbluebutton-html5/tests/puppeteer/.gitignore

bigbluebutton-html5/tests/puppeteer/chat/copy.js

bigbluebutton-html5/tests/puppeteer/chat/save.js

bigbluebutton-html5/tests/puppeteer/core/page.js

bigbluebutton-html5/tests/puppeteer/presentation/slide.js

bigbluebutton-html5/tests/puppeteer/presentation/upload.js

bigbluebutton-html5/tests/puppeteer/user/status.js

bigbluebutton-html5/tests/puppeteer/webcam.test.js

bigbluebutton-html5/tests/puppeteer/webcam/elements.js

bigbluebutton-html5/tests/puppeteer/webcam/share.js

bigbluebutton-html5/tests/puppeteer/webcam/util.js

bigbluebutton-html5/tests/puppeteer/whiteboard/draw.js