Some changes in the delivery slip layout:
- For delivered products, replaces the Quantity column by two other
columns: Ordered and Delivered;
- Shows the non-delivered products even when the delivery is done and
haven't any backorder.
task-2373833
closes odoo/odoo#61366
Signed-off-by: Rémy Voet <ryv-odoo@users.noreply.github.com>