CactiChameleon9

This needs retesting, but I don't think there are any changes from last time (no idea why there were conflicts, it was a copy paste job to current master)

Tested and working fine. I was using a checkbox for the setting instead of toggle, now fixed. Should be ready to merge

I think I prefer "Adjust brush size based on zoom level", it's unclear what a not-constant size would be. I'll admit... I was expecting feedback on the naming :sweat_smile: I...