ShowErrorWindow now actually shows the ErrorWindow

PcgsInvUi/Program.cs

@@ -1,6 +1,7 @@
 using Avalonia;
 using Avalonia.ReactiveUI;
 using System;
+using PcgsInvUi.ViewModels;
 
 namespace PcgsInvUi;
 
@@ -9,8 +10,7 @@ class Program {
     // SynchronizationContext-reliant code before AppMain is called: things aren't initialized
     // yet and stuff might break.
     [STAThread]
-    public static void Main(string[] args) => BuildAvaloniaApp()
-        .StartWithClassicDesktopLifetime(args);
+    public static void Main(string[] args) => BuildAvaloniaApp().StartWithClassicDesktopLifetime(args);
 
     // Avalonia configuration, don't remove; also used by visual designer.
     public static AppBuilder BuildAvaloniaApp()