Fix forum-11486: pressing Enter key in toolbar's search box replaces currently selected text

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@6289 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/Editing/EditingCommandHandler.cs

@@ -168,7 +168,7 @@ namespace ICSharpCode.AvalonEdit.Editing
 		static void OnEnter(object target, ExecutedRoutedEventArgs args)
 		{
 			TextArea textArea = GetTextArea(target);
-			if (textArea != null) {
+			if (textArea != null && textArea.IsKeyboardFocused) {
 				textArea.PerformTextInput("\n");
 				args.Handled = true;
 			}