Error when accepting sub request while offline
I think this error happens, when we are offline, but still have a sub request open and we click accept.
I dont think we considered the case, or do anything with the requests when we go offline.
TypeError: 'NoneType' object is not callable
File "C:/msys64/home/appveyor/gajim/win/_build_root/mingw64/lib/python3.11/site-packages/gajim/gtk/notification_manager.py", line 139, in _on_subscription_accept