Adds OF_EQUIPPABLE and ObjectFlags.IsEquipped, which allows displaying
items in lists with (in use) when equipped by another player or by a
follower.
Change the tooltip on targeted containers from 'Activate' to 'Items'
signifying there is potentially something inside (which also makes more
sense when targeting your own follower which you can 'activate' to see
its held items).
Added German translations for target window tooltips and the (in use)
text on items.
(in use)when equipped by another player or by a follower.(in use)text on items.