Code Quality: Fix closing Omnibar via pointer

Author: yaira2

src/Files.App/Views/ShellPanesPage.xaml.cs

@@ -681,7 +681,7 @@ private void Pane_PointerPressed(object sender, PointerRoutedEventArgs e)
 			// 1. Sender is not the currently active pane (user is switching panes), or the sender is the active pane,
 			// but the user is refocusing the pane (e.g. user taps pane to refocus while the Omnibar flyout is open)
 			// 2. AND the sender is a valid shell page not using a column-based layout
-			if ((sender != ActivePane || e.Pointer.PointerDeviceType == PointerDeviceType.Touch) && sender is IShellPage shellPage && shellPage.SlimContentPage is not ColumnsLayoutPage)
+			if (((IsMultiPaneActive && sender != ActivePane) || e.Pointer.PointerDeviceType == PointerDeviceType.Touch) && sender is IShellPage shellPage && shellPage.SlimContentPage is not ColumnsLayoutPage)
 				(sender as UIElement)?.Focus(FocusState.Pointer);
 		}