Revert "Lift restriction that "run" cannot be used as a callback"

This reverts commit d018be872a.

i3pystatus/core/modules.py

@@ -101,6 +101,10 @@ class Module(SettingsBase):
         elif our_method:
             cb(self, *args)
         elif hasattr(self, cb):
+            if cb is not "run":
+                # CommandEndpoint already calls run() after every
+                # callback to instantly update any changed state due
+                # to the callback's actions.
                 self.__log_button_event(button, cb, args, "Member callback")
                 getattr(self, cb)(*args)
         else: