Do not change quicksettings value when value returned is `None`

        if not opts.same_type(value, opts.data_labels[key].default):

            return gr.update(visible=True), opts.dumpjson()

        if not opts.set(key, value):

        if value is None or not opts.set(key, value):

            return gr.update(value=getattr(opts, key)), opts.dumpjson()

        opts.save(shared.config_filename)