[racket] Does Racket GUI scale?

At Wed, 9 Jul 2014 13:59:31 +0400, Dmitry Pavlov wrote:
> Interesting, thanks! You are right -- Windows does the scrolling
> smoothly with 1000 buttons. As a separate issue: look what
> happened when I raised the number to 1500:

It looks like drawing is cut off at 32767 pixels (= largest positive
value of a 16-bit signed integer). I think I looked into this before
and concluded that it's a limitation of Win32 controls, but I don't
recall how hard I tried to fix it.