Revert "20201120"

wxr

2020-11-20 e2ffb5fce53119f5cb36e3b2466becbefa096842

 HDL_ON/UI/MainPage.cs

@@ -185,5 +185,16 @@
#endif
        }

        /// <summary>
        /// 弹窗提示
        /// </summary>
        /// <param name="mes"></param>
        public static void ShowAlertOnMainThread(string mes)
        {
            Application.RunOnMainThread(() => {
                new Alert("", mes, Language.StringByID(StringId.Close)).Show();
            });
        }

    }
}