Refactor RMUI's multi state check box to extract a generic one that does not depend on the rights management

RMUI is not a very used abbreviation. I suppose it meant `Right Manager User Interface`.

Right now the Right Manager contains hard-coded multi-state check boxes. In any place where we need those multi state check boxes, we instead rely on the bootstrap switch instead.

In today's context, the code of the Rights Manager UI is quite old fashioned and patched up (lot of tech debt, reduced a bit recently but still not up to par with our current standards), I doubt we want to rely on it to create a new component of our UI. In my opinion, assuming we actually want to have this component, we should instead implement the component from scratch and use it in the rights management UI.

Closing this ticket as a `Won't fix`. Feel free to restart a discussion on the chat or forum if you think we should take this approach in XWiki Standard