auto populate armature and bone textboxes when using the eyedropper to specify constraint target.

when specifying a bone to use inside a constraint, there are two textboxes, one for the armature, and then one for the bone.

Currently when using the eyedropper to fill in that data, it only fills in the armature, and then you have to manually specify the bone from a dropdown, which might involve having to repeatedly go in and out of pose mode if you're not sure of the bone names.

It would be better if the eyedropper populated both options based on which bone is under the eyedropper when clicking.

This would be particularly useful when specifying a bone as the target in an object constraint, because the eyedropper for the bone doesn't work at all unless in pose mode, which you wouldn't be in when setting up an object constraint.