CON_MenuCancel is used for the Player menu. CON_ObjectMenuCancel is used for engine menus that are called by script. CON_CancelMenu is used for scripted menus. I assumed that if the controls for CON_ObjectMenuCancel or CON_MenuCancel are issued, this is all handled in the engine and the control doesn't even reach global func PlayerControl. If I am wrong, CON_CancelMenu is not needed and you could change the code in Libraries/ClonkControl to CON_ObjectMenuCancel and delete the CON_CancelMenu stuff from the PlayerControls.txt