add product reference for products list

this is a regular request of users
Conflicts:
	templates/backOffice/default/order-edit.html
Removed setContent() method, which is ununsed (an unusable)
add loop OrderProductTax
change condition when cart is duplicated
add order parameter to BaseSpecificModule loop
Update Customer.php

correction du texte d'erreur si le message n'est pas trouvé.
Fix prev_page usage in pagination
	modified:   templates/backOffice/default/includes/pagination.html
Merge pull request #699 from lovenunu/pagination-tpl

Fix prev_page usage in pagination
fix modification product quantity when status order is cancel
Merge pull request #702 from Alban-io/2.0-updateStock

fix modification product quantity when status order is cancel
Add function to display/calculate VAT and untaxed postage
Merge branch 'patch-vat' of https://github.com/griotteau/thelia into patch-vat