In blender, hidden items should not be selected.
Also, making an item unselectable should deselect it.
- in armature editmode (unlike posemode), hiding a bone through RNA
(unlike though the Outliner) would not deselect the bone
- in armature editmode (unlike posemode), hiding a bone through RNA
would not update the Outliner
- in armature posemode (unlike editmode), making a bone unselectable did
not deselect it (at least it did not update properly)
To resolve, add deselection to the RNA update functions and add needed
depsgraph tagging
Also add Bone selectability checkbox to Properties Editor (could be
split in a separate commit) -- came up in #127180.
Pull Request: https://projects.blender.org/blender/blender/pulls/127340
b58f61a91a