[BC] Modified ContainerItems

[shiin]

For Burning Cruasde I'd like to modify the functionality of the container item buttons like I did on the current live servers:

- Shift-Right clicking on an equippable items equips the item to the second slot if available (second ring, trinkt, weapon slot).
- Ctrl-Right clicking puts the item directly into the Auction / Send Mail / Trade frame without the need to drag and drop
- Alt-Righ clicking deletes the item with or without security questions

I've tried several things but nothing seems to really work. Hooking the OnClick functions works in principal but you are no longer able to use items while in combat. Hooking the PreClick or PostClick events also executes the OnClick function which leads to unwanted behaviour (the item is used).

Does anybody have some ideas how to get this functionality working again?