features: fixed adding nothing as new assignment bug success messsage shows up and disappears
features:
fixed adding nothing as new assignment bug
success messsage shows up and disappears

cocolocomoco21/ULCRS,cocolocomoco21/ULCRS,cocolocomoco21/ULCRS,cocolocomoco21/ULCRS,cocolocomoco21/ULCRS,cocolocomoco21/ULCRS