[Bug Fix] 尝试修复在选择状况下使用双指移动不生效的bug

Author: Raspberry-Monster

Ink Canvas/MainWindow.xaml.cs

@@ -3927,7 +3927,15 @@ private void GridInkCanvasSelectionCover_ManipulationStarting(object sender, Man
 
         private void GridInkCanvasSelectionCover_ManipulationCompleted(object sender, ManipulationCompletedEventArgs e)
         {
-
+            if (StrokeManipulationHistory?.Count > 0)
+            {
+                timeMachine.CommitStrokeManipulationHistory(StrokeManipulationHistory);
+                foreach (var item in StrokeManipulationHistory)
+                {
+                    StrokeInitialHistory[item.Key] = item.Value.Item2;
+                }
+                StrokeManipulationHistory = null;
+            }
         }
 
         private void GridInkCanvasSelectionCover_ManipulationDelta(object sender, ManipulationDeltaEventArgs e)