Fixed DeleteWindow and allowed it to close.

PcgsInvUi/Views/DeleteWindow.axaml

@@ -18,7 +18,7 @@
         <Button Grid.Row="1" Grid.Column="1" Margin="5"
                 Width="100"
                 HorizontalAlignment="Stretch" VerticalAlignment="Center"
-                HorizontalContentAlignment="Center" IsEnabled="False"
-                Content="Use X button" Command="{Binding CancelCommand}" />
+                HorizontalContentAlignment="Center" IsEnabled="True"
+                Content="No" Command="{Binding CancelCommand}" />
     </Grid>
-</Window>
+</Window>

PcgsInvUi/Views/DeleteWindow.axaml.cs

@@ -9,5 +9,6 @@ public partial class DeleteWindow : ReactiveWindow<DeleteWindowViewModel> {
     public DeleteWindow() {
         InitializeComponent();
         this.WhenActivated(d => d(ViewModel!.OkCommand.Subscribe(Close)));
+        this.WhenActivated(d => d(ViewModel!.CancelCommand.Subscribe(Close)));
     }
-}
+}

PcgsInvUi/Views/MainWindow.axaml

@@ -5,8 +5,7 @@
         xmlns:viewModels="clr-namespace:PcgsInvUi.ViewModels"
         mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
         x:Class="PcgsInvUi.Views.MainWindow" x:DataType="viewModels:MainWindowViewModel"
-        Title="Main Window"
-        WindowStartupLocation="CenterOwner">
+        Title="Main Window" WindowStartupLocation="CenterScreen" WindowState="Maximized" >
     <SplitView IsPaneOpen="True"
                DisplayMode="Inline"
                PanePlacement="Right">