Sound: Add selector for digital audio

Signed-off-by: Brandon McAnsh <brandonm@matricom.net>
Display: Welcome back Daydream. We missed you.

Signed-off-by: Brandon McAnsh <brandonm@matricom.net>
Display: Set ScreenSaverPref dependent on a timeout actually existing

Signed-off-by: Brandon McAnsh <brandonm@matricom.net>