DeliveryAdminWindow: When in member mode, show only deliveries of current season

Elwig/Windows/DeliveryAdminWindow.xaml.cs

@@ -103,7 +103,6 @@ namespace Elwig.Windows {
             Member = Context.Members.Find(mgnr) ?? throw new ArgumentException("MgNr argument has invalid value");
             Title = $"Lieferungen - {Member.AdministrativeName} - Elwig";
             AllSeasonsInput.IsEnabled = true;
-            AllSeasonsInput.IsChecked = true;
         }
 
         private void Window_Loaded(object sender, RoutedEventArgs evt) {