Duplicate admin order confirmation email sent upon "Re-send order email"

[petedermott]

If a user has completed an order they are presented with a page that gives them the opportunity to "Re-send order email" (the /checkout/complete url)

If the site has a settings.SHOP_ORDER_EMAIL_BCC variable set then this second email will also be sent to the admin (https://github.com/stephenmcd/cartridge/blob/master/cartridge/shop/checkout.py#L182) which could potentially cause confusion for the shop owners as they may think they have duplicate orders.

We could potentially just duplicate the send_order_email function as a "send_admin_order_email" function and call that once in the order view (https://github.com/stephenmcd/cartridge/blob/master/cartridge/shop/checkout.py#L182) and remove the BCC when the customers email is called but I would be interested to know if people thought this is the optimum path.