Bug 34873: Fix inconsistencies between "Sending your cart/list" headings

Bug 34873: Fix inconsistencies between "Sending your cart/list" headings

This patch modifies the templates for the popup windows which are shown
when you send a cart or a list via email in the staff interface.

To test, apply the patch and log into the staff interface.

- Perform a catalog search which will return results.
- Select one or more results and add them to the cart.
- Click the cart icon in the header menu to open the Cart popup.
- Click "Send". Compare this pop-up window to the version shown when
  sending a list:

- Open the Lists page and view the contents of a list.
- Click the "Send list" button in the toolbar.
- This popup should look correct and be consistent with the Cart
  version.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>