You could/should probably handle this manually, and just
increase the list size when you get the drop event or change event
on the list control, so the list doesn't grow forever. You could
put the list control inside a canvas potentially, so that once the
list reached a certain size, the canvas would add scroll bars, or
you could do this manually as well with the change or resize
events, by doing a conditional to set the max size of the code
(though it is more 'hardcoded' that way).