private void ShowWarning(object sender, RoutedEventArgs e)
        {
            var expandStack = new DoubleAnimation(0, _warningHeight, TimeSpan.FromMilliseconds(200));

            StackWarning.BeginAnimation(HeightProperty, expandStack);
        }
        private void HideWarning(object sender, RoutedEventArgs e)
        {
            var shrinkStack = new DoubleAnimation(_warningHeight, 0, TimeSpan.FromMilliseconds(200));

            StackWarning.BeginAnimation(HeightProperty, shrinkStack);
        }