1、修正spine动画引起的渲染问题

2、sortinggroup组件只在当前节点和其子节点有效，其他节点仍然使用节点树遍历

2.4.11/assets/test/prefabs/ListTestItem-sorting.prefab

@@ -1265,18 +1265,6 @@
     "_atlas": null,
     "_id": ""
   },
-  {
-    "__type__": "ac8d9FmQixM06C+C9zdtS2i",
-    "_name": "",
-    "_objFlags": 0,
-    "node": {
-      "__id__": 1
-    },
-    "_enabled": true,
-    "_sortingLayer": 1,
-    "_orderInLayer": 0,
-    "_id": ""
-  },
   {
     "__type__": "9f538fWaWpEkYLqGkQ0A+08",
     "_name": "",
@@ -1308,6 +1296,18 @@
     },
     "_id": ""
   },
+  {
+    "__type__": "ac8d9FmQixM06C+C9zdtS2i",
+    "_name": "",
+    "_objFlags": 0,
+    "node": {
+      "__id__": 1
+    },
+    "_enabled": true,
+    "_sortingLayer": 0,
+    "_orderInLayer": 0,
+    "_id": ""
+  },
   {
     "__type__": "cc.PrefabInfo",
     "root": {