un-dim the screen when AC is restored

[calestyo]

Hey.

Totally minor "issue":

When AC is removed, then cinnamon automatically reduces the brightness of the screen (after a while)... which is nice of course.

But when AC is restored, then one has to move the mouse or so first, before it changes the brightness back to the previous one.
It would be nice if it does so automatically, once AC is back.

Thanks,
Chris.