推拽临界范围绿底不消失BUG 手机版本推拽释放后添加了倒计时，0.2秒后检测m_GameUI.HasTower，如果true就强制重置操作

wangguan

2020-12-09 ba82423fbe7bb573f99e4377903ea9b95ec2e7a9

 Assets/Scripts/TowerDefense/UI/HUD/EndlessGameUI.cs

@@ -1103,7 +1103,7 @@
            }
        }

        void CloseCanPlace()
        public void CloseCanPlace()
        {
            dragTowerPlacement.CloseCanPlace();
            if (bInAttackModeTower != null)