Get ContentControl navigation working

Hyperbar.Windows/WidgetSettingsView.xaml.cs

@@ -0,0 +1,12 @@
+using Microsoft.UI.Xaml.Controls;
+
+namespace Hyperbar.Windows;
+
+public partial class WidgetSettingsView : UserControl
+{
+    public WidgetSettingsView() => 
+        InitializeComponent();
+
+    protected WidgetSettingsViewModel ViewModel =>
+        (WidgetSettingsViewModel)DataContext;
+}