Fix up the level descriptions used when logging an "entered new level"
event. Most of the change is for adding an extra argument to calls
to describe_level(). The curses portion is in a big chunk of old code
suppressed by #if 0.
I didn't notice that the level entry events are classified as LL_DEBUG
until all the work was done. This promotes the entry events for the
four Plane of <Element> levels from debug events to major ones instead.
It doesn't do that for the Astral Plane because the entered-the-Astral-
Plane achievement already produces a major event for that. Most other
key level entry events are in a similar situation--or will become that
way once another set of achievements eventually gets added--so there
aren't any other event classification promotions.
2bef05bb77