Changes made to `3-custom.js` to get PopupMaker to work

3-custom.js

(function($) {

var App = App || {

    // Initialization.
    init: function () {
        App.initGlobal();
        App.initBlog();
    },
    //------------------------------------------------------------------------------------------------------------------
    // Global
    //------------------------------------------------------------------------------------------------------------------
    initGlobal: function () {
        App.globalContactForm();
    },
    globalContactForm: function() {
        $(document).on('click', '.cf-submitted', function(e) {
            e.preventDefault();

            var form = $(this).closest('form');
            App.globalReloadContent(form, '.ajaxify');
        });
    },
    //------------------------------------------------------------------------------------------------------------------
    // Blog
    //------------------------------------------------------------------------------------------------------------------
    blogCurentPage: 1,
    blogPostPerPage: 4,
    initBlog: function () {
        App.blogPaging();
    },
    blogPaging: function() {
        $(document).on("click", "#more_posts", function() { // When btn is pressed.
            $(".section-blog-more-block").remove();
            //$("#more_posts").attr("disabled",true); // Disable the button, temp.
            $.post(ajaxurl, {
                action:"more_blog_items_ajax",
                offset: (App.blogCurentPage * App.blogPostPerPage),
                ppp: App.blogPostPerPage
            }).success(function(posts){
                App.blogCurentPage++;
                $(".ajaxify").append(posts);
                //$("#more_posts").attr("disabled",false);
            });
        });
    },
    /**
     * Perform ajax request.
     *
     * @param {String} target
     * @param {String} content
     * @param {integer} scroll Scrooll to location?
     * @param {String} renderPartial Custom renderPartial parameter for request.
     * @param {String} callback Callback to execute after ajax is done.
     * @param {bool} async Perform asynchronious request?
     * @returns {boolean}
     */
    globalReloadContent: function(target, content, scroll, renderPartial, callback, async) {

        var type = "POST";
        var url = ajaxurl;
        var data = "";

        if (typeof target != 'string') {
            data = target.serialize();
            type = "POST";
        } else {
            url = ajaxurl;
        }

        $('.form-success', target).hide();
        $('.form-input', target).hide();
        $('.form-error', target).hide();

        jQuery.ajax(
            {
                type:   type,
                url:    url,
                data:   data,
                async:  (async != undefined ? async : true),

                success: function (r) {
                    if (async !== false) {

                        if (r == 'success') {
                            $('.form-success', target).show();
                        } else if (r == 'input') {
                            $('.form-input', target).show();
                        } else {
                            $('.form-error', target).show();
                        }
                    }
                }
            }
        );
        return false;
    },
};

// Document ready trigger.
$(document).ready(function() {
    // Run main application initialization.
    App.init();
});
})(jQuery);