Snooze video

Adds a(n ugly) button to momentarily release the webcam for other uses.
It will show an icon to share with the rest of the participants to let them know the user is 'snoozed'.
After 10 seconds, immedia will try to regain control of the Webcam and keep trying until the user is done with the other application that uses the webcam and bring the user back into the room.