non flashing help-menu. silently ignores illegal keys
accounts for item.charges when dropping items.
fix complete; forgot to have it check item.count_by_charges()
dupe removed from mod's jason
fix basic repair kit to repair chitin items
Merge supressing menu refreshes on unrecognised key entry.
Merge pluralization fix.

Conflicts:
	src/game.cpp
Merge duplicate field removal.