Special case for when we do this on the "lock" property:
- locked Editbones are not in "selected_editable_bones"
- use "selected_bones" in that case
Both will go through `screen_ctx_selected_bones_` with the only
difference that the "_editable" version additionally checks
`EBONE_EDITABLE` (checks BONE_EDITMODE_LOCKED [which we want to avoid],
BONE_SELECTED [already done earlier])
Similar to 2a4f350940
Pull Request: https://projects.blender.org/blender/blender/pulls/141944