Guard/Sleep While Resting

Hello everyone. I'm here to propose a quick and simple idea regarding the heroes. Quite often my heroes are killed in battle and I am planning to go offline to wait for them or my army to rebuild. While they are resting I think there should be an option to set them to guard, so that they begin to defend your village right after they have regained their health. This will allow you to log off completely without risking losing defenses because of offline heroes. Thank you for your time.

I think this was suggested before and one answer was that it wasn't changed because you're forced to gem the heal time or so, doesn't make sense I wouldnt gem that time just to toggle the heroe to defend lol