Do not change the VC In's currency when the owner is entered.

When you create a VC-IN from a cargo that has a certain currency all the data is copied, but when you select an owner, the VC-in's currency is changed to the default currency that the owner has.

The idea is that the VC In's currency does not change, in other words, the same currency as the cargo is kept regardless of the entered owner.

This should work like this for the VC-INs that are created using the "Copy to VC In" and "Link to new VC In" options.