[Bug, EC] PEES-650: Fix classification-store editor grid sorting (#971)

* fix sorting

* fix sorting by key that have a protected name

Author: kingjia90

public/js/pimcore/object/classificationstore/collectionsPanel.js

@@ -90,6 +90,7 @@ pimcore.object.classificationstore.collectionsPanel = Class.create({
         this.relationsStore = new Ext.data.Store({
             autoSync: true,
             proxy: proxy,
+            remoteSort: true,
             fields: readerFields,
             listeners: listeners
         });

public/js/pimcore/object/classificationstore/groupsPanel.js

@@ -89,6 +89,7 @@ pimcore.object.classificationstore.groupsPanel = Class.create({
         this.relationsStore = new Ext.data.Store({
             autoSync: true,
             proxy: this.getRelationsProxy(),
+            remoteSort: true,
             fields: readerFields,
             listeners: listeners
         });

src/Controller/Admin/DataObject/ClassificationstoreController.php

@@ -523,7 +523,7 @@ public function collectionRelationsGetAction(Request $request): JsonResponse
         }
         $list->setOffset($start);
         $list->setOrder($order);
-        $list->setOrderKey($orderKey);
+        $list->setOrderKey($mapping[$orderKey] ?? $orderKey);
         $condition = '';
 
         if ($request->get('filter')) {
@@ -764,7 +764,7 @@ public function relationsActionGet(Request $request): JsonResponse
         $sortingSettings = \Pimcore\Bundle\AdminBundle\Helper\QueryParams::extractSortingSettings($allParams);
 
         if ($sortingSettings['orderKey'] && $sortingSettings['order']) {
-            $orderKey = $sortingSettings['orderKey'];
+            $orderKey = $mapping[$sortingSettings['orderKey']] ?? $sortingSettings['orderKey'];
             $order = $sortingSettings['order'];
         }