Bug 17472: Borrower Previously Checked Out: Display title

Bug 17472: Borrower Previously Checked Out: Display title

Test plan:
0) apply the patch
1) turn on checking previously checkouts - syspref CheckPrevCheckout
2) checkout an item to borrower
3) check the item in and check it out again, you should see the
dialog, with information that the current item was previously checked
out to this patron. With this patch, the information includes title and
author of the item

Signed-off-by:  Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>