[website/shop]product : products category "next page" don't work 

<b>Description:</b> Products in website not working properly when click on next page(it wil remove selected category).
<b>Technical Spec:</b> If category exist in URL URL value is set <code>"/shop/category/%s" % int(category.id)</code> to work currently.

<b>Task:</b> https://www.odoo.com/web#id=8759&view_type=form&model=project.task&menu_id=3942&action=327
<b>Pad:</b> https://pad.odoo.com/p/r.QdrrmFGbHk9DsF0x