initial commit for client check app

WebRTC fixes

Minor client upgrades

Fix publish step failing when multiple recordings processed in one run

The logic for deleting the process done files was wrong, resulting in
the script (attempting and failing) deleting all of the done files for
all of the processed recordings after the publish completes for one of
them.

Fix the logic to only delete the process done file for the recording that
just completed publishing.

Fixed some issues where people got stuck at connecting with webrtc

Conflicts:
	bigbluebutton-client/resources/prod/BigBlueButton.html

resized and positioned some of the components to fit with Russian and Ge...

resized and positioned some of the components to fit with Russian and German locales, changed and added some Russian translation

bbb-lti: Updated css