Only load keywords if they are specified by the user.

def get_kws(self):
        """Only load keywords if they are specified by the user."""
        ret = self.kws['dict'].copy()
        act_set = self.kws['set']
        if 'shorten' in act_set and 'goobj2fncname' not in ret:
            ret['goobj2fncname'] = ShortenText().get_short_plot_name
        return ret