Roughly sort mon-pick-data.h entries

The lists are roughly sorted by two methods. Either the branch's scaling
is unimportant or barely present, in which case the monster entries are
sorted by rough holiness / concept categories and vague strength, or the
branch scaling is obvious and relevant, which thus implies sorting by a
sucession of minimum depth, maximum depth, weight, and weighting type.

It's still not necessarily very visible in the latter case what the average
floor's population is like, but it should be a little easier to see what
the branch's overall progression is like as well direct comparsion points
for other monsters. For the former case, it makes it easier to assess what's
present in that area by virtue of the groupings.

(A handful of lines with redundant FLAT ranges were trimmed, too.)

Nothing should change, content-wise, from this. I hope.