protected void RemoveModalPanelAndWindow(IPanel panel)
{
panel.OnUnload();
if (panel is Gtk.Dialog dialog)
{
dialog.Response -= HandleModalWindowResponse;
dialog.Destroy();
}
else if (panel is Bin bin)
{
bin.Toplevel.DeleteEvent -= HandleModalWindowDeleteEvent;
bin.Toplevel.Destroy();
}
System.GC.Collect();
}