Add option to show Treasure class for each item

[vemp]

As per title, an option to display treasure class value near each item's name would be welcome, for example:
Gull (TC3)
Tyrael's Might (TC87)

Since TC is somewhat an indicator of the rarity of each item, this could easily add some excitement when inputting our last finds.

[Nasicus]

If we really want to display it, then I'd display it in the dialog which comes upf if you click an item.
If anyone want's to add this information he's welcome to do so.

We'd need to ask all TC's to the items info in the backend and then we could display it right next to the item name.