Sales teams can mark stock moves as refunds so returned or refunded items reduce the delivered quantity on the related sales order. This makes it easier to create accurate refunds based on what was actually delivered and returned.

The commit adds a "Refund" field on the stock move, in the module
sale_stock. This allows to decrease the quantity delivered in the
associated SO, and therefore to generate refunds more easily.

The website selector is now hidden from the Website Configuration view because it was confusing for regular users and could cause issues in SaaS environments. The setting remains available where needed by the HTML editor, reducing accidental misconfiguration without removing underlying functionality.

Task: https://www.odoo.com/web#id=21389&view_type=form&model=project.task&menu_id=5200
Pad: https://pad.odoo.com/p/r.xjbcD59szOZeLER9