[IMP] website_sale: avoid accesory products render

[Pablocce]

In large orders, loading accessory products takes a long time, this is an improvement to avoid unnecesary loads.

When the user hover over the cart icon, the "cart" method is called, which performs loading and rendering of elements and other checks.

There is no reason to render the accessory products if the post is "popover" and that view is rendered, since it only involves the order lines.

With this PR, we seek to optimize the order navigation and the checkout since in orders with large products there may be many accessory products.

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[pedrobaeza]

This should be done against odoo/odoo, not OCA/OCB.