UI: Disable XCI trimmer button when in-game

src/Ryujinx/UI/Views/Main/MainMenuBarView.axaml

@@ -269,7 +269,7 @@
                     <MenuItem Header="{ext:Locale MenuBarToolsUninstallFileTypes}" Click="UninstallFileTypes_Click"/>
                 </MenuItem>
                 <Separator />
-                <MenuItem Header="{ext:Locale MenuBarToolsXCITrimmer}" Click="OpenXCITrimmerWindow" Icon="{ext:Icon fa-solid fa-scissors}" />
+                <MenuItem Header="{ext:Locale MenuBarToolsXCITrimmer}" IsEnabled="{Binding EnableNonGameRunningControls}" Click="OpenXCITrimmerWindow" Icon="{ext:Icon fa-solid fa-scissors}" />
             </MenuItem>
             <MenuItem VerticalAlignment="Center" Header="{ext:Locale MenuBarView}">
                 <MenuItem VerticalAlignment="Center" Header="{ext:Locale MenuBarViewWindow}">