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_FLAG_HEADER, True))
        result.append((self.SETTING_HEADER_CONTENT, 'Notice'))
        result.append((self.SETTING_HEADER_FORMATING, {'attr': 'bold'}))
        result.append((self.SETTING_FLAG_ENUMERATE, False))
        result.append((self.SETTING_COLUMNS, None))
        result.append((self.SETTING_ROW_HIGHLIGHT, None))
        return result