private void FinishCreatingTestBtn_Click(object sender, RoutedEventArgs e)
{
MessageBox.Show($"Test{_testTitle} has been added", "Test", MessageBoxButton.OK, MessageBoxImage.Information);
StartMenu instance = Application.Current.Windows.OfType <StartMenu>().FirstOrDefault();
StartMenu new_instance = new StartMenu(instance.UA);
instance.Close();
new_instance.Show();
}