Apply new settings without clickint "Update" button

Syncs mute/unmute calls.

Improves desktop sharing error handling.

Fixes the compatability with lib-jitsi-meet for TRACK_REMOVED events for remote track to use peerconnection event instead of relying on TRACK_STOPPED event.

Fixes resizing problems introduced in last resizing commit and some previous problems with side panel open/close.

Use overriden config.channelLastN property in VideoLayout

Code cleanup

An additional fix should be added, which allow for more smooth resizing (we still see thumbnails going on a second row and then coming back up again), but this will be added in a separate commit.

Fix login/logout

Handles track removed and removes video elements. Tested by starting/stopping desktop sharing several times and we only have one video and one audio element after the PR is applied.

Escape nicknames before displaying them

leave the room if focus left

LargeVideo: detach previous stream when attaching new one

Fix watermark logo blinking during video switching

fix authentication dialog

Remove old track from the conference before adding new one

Fix screensharing mute on safari

Allow user to select camera and microphone