[rob@plan9.research.att.com]

sam on the blit had scrolling menus because someone
else implemented them in the library that sam linked
with.  i found them unusably fussy to navigate so when
sam moved off the blit scrolling menus were left
behind.  a good implementation might save the idea
but that is harder than most realize.

the simpler solution, the one we apply here, is to keep
the list of files manageable.  this means the menu works
equally well for all files all the time.

of course, this is a matter of taste.  you have the
source.

-rob