radically reduce suspend time

Right now we have a suspend time of 15 minutes. Some time after the v21.03 release is out, we can look into reducing the suspend time to something more radical like 1 minute on edge. This should increase battery lifetime, especially when just waking the phone to quickly check the time.

Once we do this, we'll probably discover that a lot of apps need a proper inhibitor to prevent the phone from suspending when it should not, and we can fix that up.