Sending a document-link from order, can we get the customer PO-number in the subject?

When sending new documents from the order module, it would be helpful to get the customers PO and our order number in the subject field of the email. Many of our customers demands all correpondance to state their PO as the subject of an e-mail.

This product idea has come to life in Autumn 2022 release.
For more information, please refer to: [NEW][Onix Work] Send your email with a customizable subject in the Orders module.