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?
I made the change for all of the page level buttons, so they should all be consistent now. We will be working on pattern libraries in the near future and will probably address the rest of the buttons then.