title: Prestashop - Cancelled order product quantity not increased in stock quantity
body: <p>I am using Prestashop Advance Stock Management System for some products. While I place order with the product (having advance stock management enabled), the quantity is deducting from the real input value(the input box which allows us to enter quantity manually) not from stock (I can see the same quantity in stock management list). After I change the order status to "Shipped/Invoiced" the stock quantity is reduced.</p>
  
  <p>When I cancel that order, the quantity is not increased in stock. I want to automatically increase the stock quantity when I cancel the order. I am newbie and I don't have any idea how to do it. Please help me to resolve this issue.</p>
  
  <p>Thanks in advance</p>