[PTRun]Don't apply transparency fix after theme change on Windows 10 (#33783)

Author: jaimecbernardo

src/modules/launcher/PowerLauncher/ViewModel/MainViewModel.cs

@@ -1014,7 +1014,12 @@ public void ToggleWox()
                 // https://github.com/lepoco/wpfui/blob/303f0aefcd59a142bc681415dc4360a34a15f33d/src/Wpf.Ui/Controls/Window/WindowBackdrop.cs#L280
                 // So we set it back with https://github.com/lepoco/wpfui/blob/303f0aefcd59a142bc681415dc4360a34a15f33d/src/Wpf.Ui/Controls/Window/WindowBackdrop.cs#L191
                 var window = Application.Current.MainWindow;
-                Wpf.Ui.Controls.WindowBackdrop.RemoveBackground(window);
+
+                // Only makes sense for Windows 11 or greater, since Windows 10 doesn't have Mica.
+                if (OSVersionHelper.IsWindows11())
+                {
+                    Wpf.Ui.Controls.WindowBackdrop.RemoveBackground(window);
+                }
 
                 // Setting uint titlebarPvAttribute = 0xFFFFFFFE; works on 22H2 or higher, 21H2 (aka SV1) this value causes a crash
                 if (OSVersionHelper.IsGreaterThanWindows11_21H2())