请合并最新代码（优化设备不支持的功能）

xm

2019-12-20 3291885285dfd5d4f665c20676307878dc3163bc

 ZigbeeApp/Shared/Phone/UserCenter/Gateway/Update/GatewayHistoryFirmwareVersionForm.cs

@@ -195,11 +195,11 @@
        /// <summary>

        /// 界面关闭

        /// </summary>

        public override void CloseForm()

        public override void CloseFormBefore()

        {

            SelectFirmwareInfoEvent = null;



            base.CloseForm();

            base.CloseFormBefore();

        }

    }

}