Bug 5894: Display all titles when confirming copy of items from cart to list

Bug 5894: Display all titles when confirming copy of items from cart to list

Adds missing code that splits biblios before calling template.

To test:
- Add some items to cart
- Open cart, select some or all items
- Add to list; with patch, following window shold show something
  like "Add 3 items to a list:", followed by list of items

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Passes koha-qa.pl, works as advertised.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>