UI: Visually merge "Actions" and "Tools" menu bar items into Actions

The contents of the menu item are dependent on whether you're in a game.
No functionality has been removed.

src/Ryujinx/UI/Windows/XCITrimmerWindow.axaml.cs

@@ -28,14 +28,14 @@ namespace Ryujinx.Ava.UI.Windows
             InitializeComponent();
         }
 
-        public static async Task Show(MainWindowViewModel mainWindowViewModel)
+        public static async Task Show()
         {
             ContentDialog contentDialog = new()
             {
                 PrimaryButtonText = string.Empty,
                 SecondaryButtonText = string.Empty,
                 CloseButtonText = string.Empty,
-                Content = new XCITrimmerWindow(mainWindowViewModel),
+                Content = new XCITrimmerWindow(RyujinxApp.MainWindow.ViewModel),
                 Title = string.Format(LocaleManager.Instance[LocaleKeys.XCITrimmerWindowTitle]),
             };