Edit brightness

This is an OS8 addition, so it still needs a good amount of testing. I would post in the Beta thread. We’ll need @profezzorn to help as the MENU_SPEC_TEMPLATE is a different system from Edit Mode, I only barely understood it enough to add to my prop (with a lot of help), I did a cursory test but it still needs a deeper dive from users so this is probably a good start.

EFFECT_POWERSAVE was an OS5 feature, it was a first attempt at controlling brightness. The Edit Brightness is a much better approach. While EFFECT_POWERSAVE works it’s a bit obsolete, I still support in the library but Edit Brightness would be the way to go moving forward IMO.