Two issues here:
- if only one bone is selected blender would create an **Empty** as
target (does not make sense as a target for an armature constraint
though)
- if other bones are also selected, none would be set up as a real
target for the Armature Constraint
So to resolve, change behavior in the following way:
- if only one bone is selected -> dont create a "dummy" target at all
(just like for `Clamp To` or `Spline IK`, does not really make sense to
create a default Curve / Armature in this case since the user would
always use something else)
- if you have another bone selected -> set it up as bone target in the
armature constraint for the user
For the second to work properly, we have to add a target to the armature
constraint "manually" (since armature constraints dont have a target by
default)
Pull Request: https://projects.blender.org/blender/blender/pulls/140200
1203b726d1