Merge pull request #4086 from oswaldoacauan/guest-policy

...utton-html5/imports/api/2.0/users/server/eventHandlers.js

...l5/imports/api/2.0/users/server/handlers/guestApproved.js

...api/2.0/users/server/handlers/guestsWaitingForApproval.js

...mports/api/2.0/users/server/handlers/validateAuthToken.js

...ports/api/2.0/users/server/modifiers/setApprovedStatus.js

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

...-html5/imports/ui/components/loading-screen/component.jsx

...on-html5/imports/ui/components/loading-screen/styles.scss

bigbluebutton-html5/private/locales/en.json