Rename MemberListWindow to MemberAdministrationWindow

Elwig/Windows/MainWindow.xaml.cs

@@ -29,7 +29,7 @@ namespace Elwig.Windows {
         }
 
         private void Button2_Click(object sender, RoutedEventArgs evt) {
-            var w = new MemberListWindow();
+            var w = new MemberAdminWindow();
             w.Show();
         }