Merge branch 'release-0.23' into develop
Improved room bar room change and leave buttons.
Never hide roombar completely.
Changed rooms service to stay in prior room when failed to join a new room because of requires account.
Expose prior room joins through rooms API and also use it on PIN entry aborts.
Hangup call on forgetUserid.
Updated to PDF.js 1.0.907
Enhanded recommended CSP to include support for pdf web worker which loads stuff from blob: urls.
Removed debug.
Also allow data: urls for fonts.
Make sure to do negotiation when creating a screensharing connection (fixes Firefox screen sharing receive support).
Make sure to do negotiation when creating a xfer connection (fixes Firefox file sharing receive support).
Cleaning up.
Make sure to trigger negotiation if there is no media.
Only auto show roombar when not with a peer.
Hide welcome screen when with peer.
Avoid dead ends in room join code and avoid to join a room when connector is not connected.
Do not auto show settings when not connected or in authorizing phase.
Added missing css class to share location button.
0.23.3