Avalonia: Add macOS check for Color Space Passthrough (#5754)

* add macOS check for color passthrough

* use existing IsMacOS property

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Co-authored-by: jcm <butt@butts.com>

src/Ryujinx.Ava/UI/ViewModels/SettingsViewModel.cs

@@ -147,6 +147,7 @@ namespace Ryujinx.Ava.UI.ViewModels
         public bool EnableTextureRecompression { get; set; }
         public bool EnableMacroHLE { get; set; }
         public bool EnableColorSpacePassthrough { get; set; }
+        public bool ColorSpacePassthroughAvailable => IsMacOS;
         public bool EnableFileLog { get; set; }
         public bool EnableStub { get; set; }
         public bool EnableInfo { get; set; }

src/Ryujinx.Ava/UI/Views/Settings/SettingsGraphicsView.axaml

@@ -73,6 +73,7 @@
                             <TextBlock Text="{locale:Locale SettingsEnableMacroHLE}" />
                         </CheckBox>
                         <CheckBox IsChecked="{Binding EnableColorSpacePassthrough}"
+                                  IsVisible="{Binding ColorSpacePassthroughAvailable}"
                             ToolTip.Tip="{locale:Locale SettingsEnableColorSpacePassthroughTooltip}">
                             <TextBlock Text="{locale:Locale SettingsEnableColorSpacePassthrough}" />
                         </CheckBox>
@@ -296,4 +297,4 @@
             </StackPanel>
         </Border>
     </ScrollViewer>
-</UserControl>
+</UserControl>