Lines not yet covered in keys group, other than deactivate_current_config and activate_config_changes functions:

def save_new_key_set
    if not idleConf.userCfg['keys'].has_section(keyset_name):
# never false - minor issue

def delete_custom_keys
    if not item_list:
# never false hence following never executed
    else: self.customlist.SetMenu(item_list, item_list[0])