[FIX] point_of_sale: automatic selection of customer pricelist
[FIX] point_of_sale: automatic selection of customer pricelist

When changing the customer to a customer with a different pricelist
than the pos default, the customer pricelist was not automatically selected.

This is because of an oversight in the below revision:
f76cc095b8493dfac788f5e1a545adc571f0693f

opw-1843709
fixes #24611

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo