Case-insensitive search for UPC
Case-insensitive search for UPC

As far as I know, UPCs are rarely case sensitive. So let's treat them
that way in the dashboard search.

django-oscar/django-oscar,django-oscar/django-oscar,solarissmoke/django-oscar,solarissmoke/django-oscar,django-oscar/django-oscar,django-oscar/django-oscar,solarissmoke/django-oscar,solarissmoke/django-oscar