Bug 15137: Display ISBN and author info when sending list by email

Bug 15137: Display ISBN and author info when sending list by email

Disclaimer: this is not caused by bug 14544 :)
And can be backported!

Both isbn and author information are missing when a list is sent by
email.
Emails sent from OPAC and staff should be (almost) the same.

Test plan:
1/ Sent a list by email (Button "Send list")
2/ The email you will receive should contain the isbn and author info

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
On top of last patch of Bug 14544
Works ok, mail with authors and ISBN
No errors

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