Add update settings panel

SettingsWindow/UpdateSettingsPanel.xaml.cs

@@ -0,0 +1,31 @@
+using System.Windows;
+using WorldClockStatusWindow.Properties;
+
+namespace WorldClockStatusWindow.SettingsWindow;
+
+public partial class UpdateSettingsPanel
+{
+    public UpdateSettingsPanel()
+    {
+        InitializeComponent();
+    }
+
+    public override string CategoryName => Properties.Resources.optionCategoryUpdate;
+
+    private void HandleCheckVersionNowButtonClick(object sender, RoutedEventArgs e)
+    {
+        UpdateCheck.DisplayUpdateInformation(true);
+    }
+
+    private void OnSaveSettings(object sender, RoutedEventArgs e)
+    {
+        SaveSettings();
+    }
+
+    private void SaveSettings()
+    {
+        if (!HasLoaded) return;
+
+        Settings.Default.Save();
+    }
+}