Feature Request: additional fields in ordernumber

[witoldwegner]

I have a client who urgently needs more information in the order number displayed in Mollie, especially the numbers of the ordered products.
I patched the plugin in a somewhat quick-and-dirty way with this patch and am using {ordernumber}_{productnumbers} in the plugin configuration.

A more flexible approach that includes other fields would likely be highly appreciated.

Regards,
Witold

productnumbers.patch