Don't allow the user to construct a count value when operating on
a pick-none menu where counts aren't meaningful. Unfortunately
that can still be done on pick-one or pick-any menus which don't
happen to have any entries where a count is applicable.
Allow a count to be optionally started with '#'. Note that if
there is an entry using '#' for the selector letter (probably
inventory that has something in the overflow slot), typing '#'
will select the entry instead of initiating a count.
Flail about a bit trying to get menu size correct--failed on this
front.
7277b4a415