Get list of all appropriate settings and their default values.

def list_settings(self):
        """
        Get list of all appropriate settings and their default values.
        """
        result = super().list_settings()
        result.append((self.SETTING_LIST_FORMATING, {}))
        result.append((self.SETTING_LIST_STYLE, 'utf8.a'))
        result.append((self.SETTING_LIST_TYPE, 'unordered'))
        return result