[Feature Request] move overlays during screensaver to prevent burn-in

[chriswep]

I couldn't find the option in the Overlays configuration.

One possible way of implementing this would be to very slowly adjust the margin of the overlays between something like 20 and 200.

[glouel]

There was a random corner option for people who cared about burnin (seems like a non issue nowadays), but I took a PR from someone who messed up the ui and it's no longer visible. Will need to check.