sale_order_customer_free_ref

Purpose

Allows sales orders to separate the customer order number and free reference while keeping the combined reference and sharing it with invoices.

Features

sale.order: Adds dedicated fields for the customer order number and free reference, computes the combined customer reference from them, and keeps the standard field read-only in the form.
sale.order: Propagates the customer order number and free reference to created invoices along with the combined reference.
account.move: Stores the customer order number and free reference on invoices and displays them next to the invoice reference.