EasyUI combotree 设置节点折叠和叶子节点循环展开的BUG

树实体
 public class Combotree
    {
        public string id { get; set; }
        public string text { get; set; }
        public string state { get; set; }
        public List<Combotree> children { get; set; }
    }
只需要在初始化数据的时候给    state 设置为 closed

注意：不要在最后一级节点设置该字段为 closed