Фикс допполей поиска

shop2.search.getParams = function (folder_id, func) {
    var gr_filter_max_count = shop2.my.gr_filter_max_count;
    var url;

    shop2.trigger("beforeGetFolderCustomFields");

    if (folder_id > 0) {
        url =
            "/my/s3/api/shop2/?cmd=getFolderCustomFields" +
            "&hash=" +
            shop2.apiHash.getFolderCustomFields +
            "&ver_id=" +
            shop2.verId +
            "&folder_id=" +
            folder_id +
            "&" +
            decodeURIComponent(document.location.search).replace(/[^&]*=(&|$)/g,"");

        if (gr_filter_max_count) {
            url = url + `gr_filter_max_count=${gr_filter_max_count}&`;
        };

        $.getJSON(url, function (d, status) {
            shop2.fire("afterGetFolderCustomFields", func, d, status);
            shop2.trigger("afterGetFolderCustomFields", d, status);
        });
    };
};