It appears I have a small bug in how size-groups and/or generic size-requests
work. It seems that margins should be part of the request, but I'm adding those
on after the request, not as part of the request. But we can workaround that by
putting a one element box around the elements with margins and put those boxes
into the size group instead. That way it works now, and will continue to work
after I change the request+margin logic

tristates are a pain, They are always set to "state unknown" on .ui load, while
in .src load they default to "state nocheck". So to be super sure that the
logic is unchanged set them explicitly initially in .cxx to "state nocheck"

restore accessibility relationship between tristate used as a label and the
labeled thing.

Change-Id: Ibf4879c3e9a4ecc4726896479377f51bf727b238