Save the current department

        :returns: None
        :rtype: None
        :raises: None

def dep_save(self, ):
        """Save the current department

        :returns: None
        :rtype: None
        :raises: None
        """
        if not self.cur_dep:
            return
        ordervalue = self.dep_ordervalue_sb.value()
        desc = self.dep_desc_pte.toPlainText()
        self.cur_dep.ordervalue = ordervalue
        self.cur_dep.description = desc
        self.cur_dep.save()