private void tmiCentreImage_Click(object sender, EventArgs e)
        {
            var panPctBox = ContainerUtils.GetToolStripSourceControl(sender) as PannablePictureBox;

            if (panPctBox != null)
            {
                panPctBox.CenterImage();
            }
        }
        private void tmiChangeImage_Click(object sender, EventArgs e)
        {
            var panPctBox = ContainerUtils.GetToolStripSourceControl(sender);

            if (panPctBox != null)
            {
                IconSet(panPctBox);
            }
        }