Screensaver overlay and camera options

Add the same options to the screensaver camera as the camera card. Fill screen or show entire picture.

It would also be nice to have the option to show the clock, weather and 1 or 2 entities (like an all lights group when at least one light is on). This would turn the screensaver in a glanceable "what happens right now". The media player or future picture screensaver might also benefit from this kind of overlay.