Pull request #2125: DEC-20331 fix: 【冒烟】【目录管理】bi工程添加拖动目录节点均有问题

Merge in VISUAL/fineui from ~DAILER/fineui:master to master

* commit 'f49a860346059ee9fe643a11d5bf21513ece9b60':
  DEC-20331 fix: 【冒烟】【目录管理】bi工程添加拖动目录节点均有问题

src/core/wrapper/layout.js

@@ -447,7 +447,7 @@ BI.Layout = BI.inherit(BI.Widget, {
                 } else {   //  如果新节点在旧节点区间中存在就复用一下
                     var sameOldIndex = sameOldVnode[1];
                     updated = self.patchItem(sameOldVnode[0], newStartVnode, sameOldIndex, newStartIdx) || updated;
-                    children[sameOldVnode[0].key == null ? newStartIdx : sameOldVnode[0].key] = self._children[self._getChildName(newStartIdx)] = self._children[self._getChildName(sameOldIndex)];
+                    children[sameOldVnode[0].key == null ? newStartIdx : sameOldVnode[0].key] = self._children[self._getChildName(sameOldIndex)];
                     if (newStartIdx !== sameOldIndex) {
                         delete self._children[self._getChildName(sameOldIndex)];
                     }