updates and fixes chat, notifications and presentation test suites

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

bigbluebutton-html5/tests/puppeteer/breakout.obj.js

bigbluebutton-html5/tests/puppeteer/breakout/create.js

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

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

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

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

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

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

bigbluebutton-html5/tests/puppeteer/notifications.obj.js

...tton-html5/tests/puppeteer/notifications/notifications.js

bigbluebutton-html5/tests/puppeteer/package.json

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

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

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

bigbluebutton-html5/tests/puppeteer/virtualizedlist.obj.js