private void btnUndoClose_DropDownOpened(object sender, EventArgs e) {
rotGallery.Items.Clear();
foreach (NavigationLog item in tcMain.ReopenableTabs) {
var gli = new UndoCloseGalleryItem();
gli.LoadData(item);
gli.Click += gli_Click;
rotGallery.Items.Add(gli);
}
}