So this is still raw, probably need some more adjustments and so on, but works for me.
Probably need to handle other unit frames, etc.
Still working on trying to figure out why binding texts and macro text get pushed in once Masque skin is applied.
Also there is an issue if you enable Masque on action bars, and remove Masque from auras, LS:UI border doesn't get added back, since they are created from same core/button function. Either need to split or somehow need to divide, since I added changes to core/button, so it doesn't apply LS:UI border on created buttons, if action bars are skinned.
So this is still raw, probably need some more adjustments and so on, but works for me. Probably need to handle other unit frames, etc. Still working on trying to figure out why binding texts and macro text get pushed in once Masque skin is applied. Also there is an issue if you enable Masque on action bars, and remove Masque from auras, LS:UI border doesn't get added back, since they are created from same core/button function. Either need to split or somehow need to divide, since I added changes to core/button, so it doesn't apply LS:UI border on created buttons, if action bars are skinned.