User portal creates SO and proceeds checkout by paypal. The system will automatically confirm SO and generate PO. Since the PO is created by the user portal, the user portal can see the PO. closes odoo/odoo#100920 X-original-commit: a4a062301a1ebd06057aa9468c3734dab2441814 Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com>