private void MinimizePanel_Click(object sender, RoutedEventArgs e)
        {
            switch (FormattingPanel.Visibility)
            {
            case Visibility.Visible:
                double originalTop  = this.Top;
                double originalLeft = this.Left;
                panelLocation = ControlsPanel.TransformToVisual(this).Transform(new Point(0, 0));
                FormattingPanel.Visibility  = Visibility.Collapsed;
                MinimizePanelButton.Content = "+";
                this.Top  = originalTop + panelLocation.Y;
                this.Left = originalLeft + panelLocation.X;
                break;

            case Visibility.Hidden:
            case Visibility.Collapsed:
                FormattingPanel.Visibility  = Visibility.Visible;
                MinimizePanelButton.Content = "-";
                this.Top  -= panelLocation.Y;
                this.Left -= panelLocation.X;
                break;
            }
        }