[IMP] e-commerce onboarding misc improvements [bst]

Task: https://www.odoo.com/web#id=10453&view_type=form&model=project.task&action=327
Pad: https://pad.odoo.com/p/r.eQNwZOFNkcYt31Sw
While you are at it, we should avoid this kind of construction. Could you improve this by rendering a small qweb template ? This way it will be translatable and easy to inherit through qweb inheritance.