Several changes distinguish product attributes better from variant attributes. The variant creation mode is added on the template form for attribute lines with more than one value. Specification attributes are no longer listed as variant attributes in the product variant form and tree views. task-2466988 closes odoo/odoo#72559 Signed-off-by: Jérémy Kersten (jke) <jke@openerp.com> Co-authored-by: Tom De Caluw <tdc@odoo.com> Co-authored-by: Jeremy Kersten <jke@odoo.com>