Fixed some wordings for -item, added info for -enditem

-item is no longer worded in a strange way, and is much more concise.

-enditem takes note of moves like Thief, which do not trigger -enditem.
When the item is changed from a move, `-item` is still used. I just Tricked an item to a Latios and got `|-item|p1a: Latios|Life Orb|[from] move: Trick`, so I don't understand what you mean by `-item` only being used when it's revealed.