This PR adds an option "Affect Gizmo" for custom shape transforms to affect
the transform gizmos. If enabled, this will place the gizmo at the
location and orientation of the "Override Transform" (i.e. in its local space).
For Orientations: The gizmo mode *is* respected. I.e. global mode is aligned to the world etc.
There is a special case for "Gimbal" where it will not follow the orientation of the
"Override Transform" bone. I think it makes sense to keep it that way since this
is about the channels of the bone you are actually manipulating.
The other option is "Use as Pivot" with which the bone is actually rotated
around the override bone. This can be useful for rigs in which shapekeys and
armature deformation is combined
Taken over from #136468
For design task #135429
Co-authored-by: Wayde Moss <wbmoss_dev@yahoo.com>
Pull Request: https://projects.blender.org/blender/blender/pulls/142847
b2653be057