When a new item is active, other items are only deactivated in the
`set_state_active` method. This doesn't run if the new item is not
displayed by the shelf for whatever reason (e.g. catalog filters).
To fix this, just set the item inactive. This may be redundant with
the deactivation in `set_state_active`, or it might not be, depending
on whether the active item is visible.
Pull Request: https://projects.blender.org/blender/blender/pulls/121589
ac7ceba950