想刷新树，但是根据API来的refresh无效
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https://bbs.csdn.net/topics/391881528
这个博客的作者的三个尝试都是根据API来的，都是无效的，比如refresh
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建议直接用init重新初始化，亲测有用
https://tieba.baidu.com/p/3558214738?red_tag=2739316990
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var treeObj = $.fn.zTree.init($("#treeAdmin"), setting);
$('body').on('click', '.list-table .handle .edit', function() {
$mask.show();
$editpopup.show();
//刷新树
treeObj = $.fn.zTree.init($("#treeAdmin"), setting);
});