Make boolean attributes a toggle button in the Attributes menu

[mojavelinux]

Under the Attributes menu, attribute entries which act as booleans should be represented as a toggle button instead of multiple entries. This may either be a two-state toggle or a three-state toggle. We can use a glyph or icon to represent the state.

Ideally, the menu would stay open after a click, though it wouldn't be a showstopper if the first implementation required the menu to be opened each time.