Merge pull request #9218 from antobinary/2020-04-23-locales

bigbluebutton-html5/imports/startup/client/intl.jsx

bigbluebutton-html5/private/locales/ar.json

bigbluebutton-html5/private/locales/de.json

bigbluebutton-html5/private/locales/es.json

bigbluebutton-html5/private/locales/fi.json

bigbluebutton-html5/private/locales/hy_AM.json

bigbluebutton-html5/private/locales/nb_NO.json

bigbluebutton-html5/private/locales/sl.json

bigbluebutton-html5/private/locales/zh_TW.json