When the extended command menu auto-scrolls as the player types in
characters, scroll so that all matching entries come into view rather
than just the first one. For example, it someone types 'w', instead
of just highlighting and showing "wipe", it will highlight "wipe"
(because that has become the default response when <return> is used)
but also show "wiz-this", "wiz-that", and "wmode". It actually shows
one extra entry beyond the last matching one--so you can see that
there aren't any more ambiguous choices--except for 'w' where "wmode"
is the very last extended command.
Previously, on subsequent popups of the extended command menu, the
scrollbar's slider was left drawn in the position it was in during
the previous time even though menu content wasn't scrolled. Now it's
forced back to the top (non-scrolled) position when that menu is
popped up.