When a store has showActualItem set to True, it shows the true identity of unknown items.

But now that we have multiple variations of unknown types, there are cases where the it will appear that an item is not stacking properly. For example, if there are two targeting ROMs at the shop, each of a different unknown type, then they will not stack.

The easiest solution is probably to force unknown items to collapse if they are on a station that shows actual items. This is made easier by the fact that we now have a property to specify this. In OnScreenInit for Commodities Exchange we should just reset the unknown item type to a single type.