I need to rewrite default view - commerce_cart_form, because of my design of /cart page. So, I've created file views-view--commerce-cart-form.tpl.php and try to repeat something like on original /cart page were. I can print all needed information about line items in cart, but I don't know how to create "Update" button, to change quantity which I typed in textfield with quantity of line item. That's why I want to get help with this.
I use Drupal Commerce 7.x-1.9
Many thanks in advance!