Fix an issue where the options in MenuDialog could not full scroll for
an unknown reason.
Derived from some absurd issue where BottomSheetBehavior dislikes
ConstraintLayout's spacing and decides to improperly allocate enough
space for the RecyclerView to scroll.
Use the new menu system in all applicable places.
More consideration is needed right now on whether the toolbars should
also have menu items, so they remain unchanged right now.
Add a dialog that shows menu information as a bottom sheet instead of as
a PopupMenu.
This did not take as much finessing of BottomSheetBehavior as the main
playback UI framework did, just some style redefinitions.
