private void CalculateMeal_Click(object sender, RoutedEventArgs e)
        {
            var newWindow = new CalculateMealWindow();

            newWindow.Show();
            this.Close();
        }
        private void ReCalculate_Click(object sender, RoutedEventArgs e)
        {
            Application.Current.Resources["list"]     = null;
            Application.Current.Resources["mainStep"] = null;
            var newWindow = new CalculateMealWindow();

            newWindow.Show();
            this.Close();
        }