When the module "sale_product_configurator" is not installed, an AttributeError is raised
Steps to reproduce:
Install the "point_of_sale" app, the "pos_self_order_sale" module and remove the "sale_product_configurator" module
Go to settings -> point of sale -> Self ordering: QR Menu -> preview web interface
Cause:
The field "optional_product_ids" is provided by the module "sale_product_configurator" which is not a dependency of this module
opw-3850421
closesodoo/odoo#161921
Signed-off-by: Joseph Caburnay (jcb) <jcb@odoo.com>