Fixed forum-8538: incorrect selection on Undo/Redo.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/3.0@3664 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/Libraries/ICSharpCode.TextEditor/Project/Src/Undo/UndoStack.cs

@@ -211,11 +211,13 @@ namespace ICSharpCode.TextEditor.Undo
 			{
 				redoPos = stack.TextEditorControl.ActiveTextAreaControl.Caret.Position;
 				stack.TextEditorControl.ActiveTextAreaControl.Caret.Position = pos;
+				stack.TextEditorControl.ActiveTextAreaControl.SelectionManager.ClearSelection();
 			}
 			
 			public void Redo()
 			{
 				stack.TextEditorControl.ActiveTextAreaControl.Caret.Position = redoPos;
+				stack.TextEditorControl.ActiveTextAreaControl.SelectionManager.ClearSelection();
 			}
 		}
 	}