Overwrite the method ``write`` of the model ``product.product``. When we write on ``standard_price``, if - the context key ``disable_auto_svl`` is not set - the ``cost_method`` is not "fifo" We automatically compute ``stock.valuation.layer`` (before we needed to manually call ``_change_standard_price``) Task #2031422 closes odoo/odoo#41265 Signed-off-by: Simon Lejeune (sle) <sle@openerp.com>