No, grml-medium doesn't provide a special version of grml-quickconfig. The 
problem is, that the list at all isn't created on demand.
Assigning the issue to formorer, he's the perl hacker. ;)

the perl script grml-quick-config on grml-medium has much too many entries in
hash %windowmanagers when wanting to choose a window manager. Only fluxbox and
wm-ng should be kept in that hash.