GUI tries to `update_status_color` of deleted attacker object

[mrkickling]

Traceback (most recent call last): 
 File "/home/sandor/.local/share/pipx/venvs/mal-gui/lib/python3.13/site-packages/mal_gui/object_explorer/attacker_item.py", line 51, in update_status_color 
   self.update() 
   ~~~~~~~~~~~^^ 
RuntimeError: Internal C++ object (AttackerItem) already deleted.