Add ESD item to order afterwards

[mitelg]

If ESD items are later added to an order, the items appear in the order and also in the frontend in the customer account. However, no download link is provided.

This seems to be because Shopware does not recognise that it is an ESD article and therefore the value in the s_order_details table in the associated esdarticle column is not automatically set to 1.

If the value is manually changed to 1, the download is available in the customer account.