change link back

[DreadKnight]

In the items system, when clicking on an item, a pop-up shows up and displays details about it and also, the navigation url is changed to point to that item. But when closing the info pop-up, the link isn't changed back.
Would be nice to have the link change back to "http://ancientbeast.com/items/" when closing the pop-up. This patch could probably also apply to the bestiary after it will get it's improvements.