MAGETWO-87013: Cart Price Rules - Category Drill Down problems

Author: RuslanKostiv1

app/code/Magento/Catalog/view/adminhtml/templates/catalog/category/checkboxes/tree.phtml

@@ -76,6 +76,16 @@ jQuery(function()
        dataUrl: '<?= /* @escapeNotVerified */ $block->getLoadTreeUrl() ?>'
     });
 
+    categoryLoader.processResponse = function (response, parent, callback) {
+        var config = JSON.parse(response.responseText);
+
+        this.buildCategoryTree(parent, config);
+
+        if (typeof callback == "function") {
+            callback(this, parent);
+        }
+    };
+
     categoryLoader.createNode = function(config) {
         config.uiProvider = Ext.tree.CheckboxNodeUI;
         var node;

app/code/Magento/SalesRule/Controller/Adminhtml/Promo/Widget/CategoriesJson.php

@@ -0,0 +1,16 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento\SalesRule\Controller\Adminhtml\Promo\Widget;
+
+class CategoriesJson extends \Magento\CatalogRule\Controller\Adminhtml\Promo\Widget\CategoriesJson
+{
+    /**
+     * Authorization level of a basic admin session
+     *
+     * @see _isAllowed()
+     */
+    const ADMIN_RESOURCE = 'Magento_SalesRule::quote';
+}