[BUG] TrayIcon crashes application on closing (Windows)

Describe the bug Application crashed on Windows if you exit and there is a tray icon on the main window

To Reproduce Not sure if this happens on other operation systems as well only tested it on Windows

1. Create a new mvvm application
2. Set it up as a fluent design application
3. Add a tray icon to the application (See additional context)
4. Start the application via Debug/Release
5. Close the application with the close button
6. Crash on program.cs -> System.NullReferenceException: 'Object reference not set to an instance of an object.'

Expected behavior The application closes successfully

Desktop (please complete the following information):

• OS Windows 10
• Avalonia Version 0.10.12

Additional context Tray icon code

<TrayIcon.Icons>
     <TrayIcons>
          <TrayIcon Icon="/Assets/avalonia-logo.ico" Command="{Binding ShowApplicationCommand}" ToolTipText="Modular tool manager">
               <TrayIcon.Menu>
		     <NativeMenu>
		          <NativeMenuItem Header="Testing" Command="{Binding ExitApplicationCommand}"/>
		     </NativeMenu>
		</TrayIcon.Menu>
	    </TrayIcon>
	</TrayIcons>
</TrayIcon.Icons>

Stacktrace

System.NullReferenceException
  HResult=0x80004003
  Message=Object reference not set to an instance of an object.
  Source=Avalonia.Controls
  StackTrace:
   at Avalonia.Controls.TrayIcon.RemoveIcons(IEnumerable`1 icons) in /_/src/Avalonia.Controls/TrayIcon.cs:line 204
   at Avalonia.Controls.TrayIcon.Lifetime_Exit(Object sender, ControlledApplicationLifetimeExitEventArgs e) in /_/src/Avalonia.Controls/TrayIcon.cs:line 195
   at Avalonia.Controls.ApplicationLifetimes.ClassicDesktopStyleApplicationLifetime.DoShutdown(ShutdownRequestedEventArgs e, Boolean force, Int32 exitCode) in /_/src/Avalonia.Controls/ApplicationLifetimes/ClassicDesktopStyleApplicationLifetime.cs:line 173
   at Avalonia.Controls.ApplicationLifetimes.ClassicDesktopStyleApplicationLifetime.TryShutdown(Int32 exitCode) in /_/src/Avalonia.Controls/ApplicationLifetimes/ClassicDesktopStyleApplicationLifetime.cs:line 91
   at Avalonia.Controls.ApplicationLifetimes.ClassicDesktopStyleApplicationLifetime.HandleWindowClosed(Window window) in /_/src/Avalonia.Controls/ApplicationLifetimes/ClassicDesktopStyleApplicationLifetime.cs:line 82
   at Avalonia.Controls.ApplicationLifetimes.ClassicDesktopStyleApplicationLifetime.WindowClosedEvent(Object sender, RoutedEventArgs e) in /_/src/Avalonia.Controls/ApplicationLifetimes/ClassicDesktopStyleApplicationLifetime.cs:line 33
   at Avalonia.Interactivity.RoutedEvent.<>c__DisplayClass23_0.<AddClassHandler>b__0(ValueTuple`2 args) in /_/src/Avalonia.Interactivity/RoutedEvent.cs:line 94
   at System.Reactive.AnonymousObserver`1.OnNextCore(T value) in /_/Rx.NET/Source/src/System.Reactive/AnonymousObserver.cs:line 67
   at System.Reactive.ObserverBase`1.OnNext(T value) in /_/Rx.NET/Source/src/System.Reactive/ObserverBase.cs:line 36
   at System.Reactive.Subjects.Subject`1.OnNext(T value) in /_/Rx.NET/Source/src/System.Reactive/Subjects/Subject.cs:line 147
   at Avalonia.Interactivity.EventRoute.RaiseEventImpl(RoutedEventArgs e) in /_/src/Avalonia.Interactivity/EventRoute.cs:line 148
   at Avalonia.Interactivity.EventRoute.RaiseEvent(IInteractive source, RoutedEventArgs e) in /_/src/Avalonia.Interactivity/EventRoute.cs:line 87
   at Avalonia.Interactivity.Interactive.RaiseEvent(RoutedEventArgs e) in /_/src/Avalonia.Interactivity/Interactive.cs:line 122
   at Avalonia.Controls.Window.HandleClosed() in /_/src/Avalonia.Controls/Window.cs:line 942
   at Avalonia.Win32.WindowImpl.AppWndProc(IntPtr hWnd, UInt32 msg, IntPtr wParam, IntPtr lParam) in /_/src/Windows/Avalonia.Win32/WindowImpl.AppWndProc.cs:line 86
   at Avalonia.Win32.WindowImpl.WndProc(IntPtr hWnd, UInt32 msg, IntPtr wParam, IntPtr lParam) in /_/src/Windows/Avalonia.Win32/WindowImpl.WndProc.cs:line 30

[maxkatz6]

This was fixed in master

[tsuckow]

I present you the workaround. Why it doesn’t register itself I don’t know.

public override void OnFrameworkInitializationCompleted()
{
    if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
    {
        desktop.MainWindow = new MainWindow();

        var trayIcon = new TrayIcon();
        trayIcon.Icon = desktop.MainWindow.Icon;
        trayIcon.ToolTipText = "Test";

        // Workaround for https://github.com/AvaloniaUI/Avalonia/issues/7588
        var icons = new TrayIcons();
        icons.Add(trayIcon);
        TrayIcon.SetIcons(Application.Current!, icons);
    }

    base.OnFrameworkInitializationCompleted();
}