Unit publishing and button sync up

This PR completes the Unit publishing widget styles (aside from synching up the colors with the WIP outline) and syncs up buttons page level/mast buttons across Studio. 

@talbs Can you review my work here? @cahrens Can you review (once tests pass) to make sure I didn't revert any recent changes?
Definitely something to look in to, but since we're not using it anywhere else in Studio, I'm going to leave it as-is until we discuss patterns in general.