Merge remote-tracking branch 'origin/MAGETWO-99361' into 2.3-develop-pr25

Author: serhii-balko

app/code/Magento/Catalog/view/adminhtml/web/js/category-tree.js

@@ -37,8 +37,8 @@ define([
                             ajax: {
                                 url: options.url,
                                 type: 'POST',
-                                success: $.proxy(function (node) {
-                                    return this._convertData(node[0]);
+                                success: $.proxy(function (nodes) {
+                                    return this._convertDataNodes(nodes);
                                 }, this),
 
                                 /**
@@ -77,6 +77,21 @@ define([
             }
         },
 
+        /**
+         * @param {Array} nodes
+         * @returns {Array}
+         * @private
+         */
+        _convertDataNodes: function (nodes) {
+            var nodesData = [];
+
+            nodes.forEach(function (node) {
+                nodesData.push(this._convertData(node));
+            }, this);
+
+            return nodesData;
+        },
+
         /**
          * @param {Object} node
          * @return {*}