void Button3Click(object sender, EventArgs e)
        {
            AddEditDeviceDialog d = new AddEditDeviceDialog(Configuration, null);

            if (d.ShowDialog(this) == DialogResult.OK)
            {
                RefreshConfiguration();
            }
        }
        void Button4Click(object sender, EventArgs e)
        {
            Device f = Selected;

            if (f != null)
            {
                AddEditDeviceDialog d = new AddEditDeviceDialog(Configuration, f);
                if (d.ShowDialog(this) == DialogResult.OK)
                {
                    RefreshConfiguration();
                }
            }
        }