improve:PPT墨迹显示

Ink Canvas/MainWindow_cs/MW_PPT.cs

@@ -758,8 +758,6 @@ namespace Ink_Canvas
                         PenIcon_Click(null, null);
                         // 然后设置颜色
                         BtnColorRed_Click(null, null);
-                        Dispatcher.BeginInvoke(new Action(() =>
-                        {
                         try
                         {
                             if (inkCanvas.EditingMode == InkCanvasEditingMode.Ink)
@@ -788,7 +786,6 @@ namespace Ink_Canvas
                         {
                             LogHelper.WriteLogToFile($"PPT进入批注模式后同步浮动栏高光状态失败: {ex.Message}", LogHelper.LogType.Error);
                         }
-                        }), DispatcherPriority.Loaded);
                     }
 
                     isEnteredSlideShowEndEvent = false;