Switch FooterPages type back to PageViewBase

StabilityMatrix.Avalonia/App.axaml.cs

@@ -203,14 +203,14 @@ public partial class App : Application
             new MainWindowViewModel(provider.GetRequiredService<ISettingsManager>(),
                 provider.GetRequiredService<ServiceManager<ViewModelBase>>())
             {
-                Pages = new List<PageViewModelBase>
+                Pages =
                 {
                     provider.GetRequiredService<LaunchPageViewModel>(),
                     provider.GetRequiredService<PackageManagerViewModel>(),
                     provider.GetRequiredService<CheckpointsPageViewModel>(),
                     provider.GetRequiredService<CheckpointBrowserViewModel>(),
                 },
-                FooterPages = new List<object>
+                FooterPages =
                 {
                     provider.GetRequiredService<SettingsViewModel>()
                 }

StabilityMatrix.Avalonia/DesignData/DesignData.cs

@@ -85,14 +85,14 @@ public static class DesignData
         // Main window
         MainWindowViewModel = new MainWindowViewModel(settingsManager, dialogFactory)
         {
-            Pages = new List<PageViewModelBase>
+            Pages =
             {
                 LaunchPageViewModel,
                 PackageManagerViewModel,
                 CheckpointsPageViewModel,
                 CheckpointBrowserViewModel
             },
-            FooterPages = new List<PageViewModelBase>
+            FooterPages =
             {
                 SettingsViewModel
             }