Rework Win2D editor for design model

src/ReactorMaintenance.Win2D/App.xaml.cs

@@ -1,19 +1,19 @@
-using Microsoft.UI.Xaml;
-
-namespace ReactorMaintenance.Win2D;
-
-public partial class App
-{
-    public App()
-    {
-        InitializeComponent();
-    }
-
-    protected override void OnLaunched(LaunchActivatedEventArgs args)
-    {
-        m_Window = new MainWindow();
-        m_Window.Activate();
-    }
-
-    private Window? m_Window;
+using Microsoft.UI.Xaml;
+
+namespace ReactorMaintenance.Win2D;
+
+public partial class App
+{
+    public App()
+    {
+        InitializeComponent();
+    }
+
+    protected override void OnLaunched(LaunchActivatedEventArgs args)
+    {
+        m_Window = new MainWindow();
+        m_Window.Activate();
+    }
+
+    private Window? m_Window;
 }