Editing WoW:API UseContainerItem (section)

==Protection Notes==
This function is protected except for the following:
* When the (Guild) Bank is open: Move the item to/from the (Guild) Bank.
* When the Merchant frame is open: Sell the item.
* When the Mail frame is open and on the "Send Mail" tab: Add the item to the attachments.
* When the item is equippable: Equip the item.
* When the slot is empty: Do nothing.
* When the item is a locked Lockbox: Show an error message that says it's locked.
* When the item is a container (Clam Shell, Unlocked Lockbox, etc.): Open the Loot frame and show the contents.
* When the item is a book: Open the book's Gossip frame for reading.
* When the item is not a usable item: Do nothing.
* When the item starts a quest: Open the quest Gossip frame for reading.
* When the Trade frame is open: Add the item to the list of items to be traded. (I have not confirmed this)
* When the Auctions tab is open: Add item for auction pricing and submission.