Bug 15738: Show rental fees on OPAC summary page

Bug 15738: Show rental fees on OPAC summary page

This patch adds a few lines that check for a rental fee on an item. If
yes, it will show in brackets as a rental fee on the OPAC summary page.

To test:
1) Have a borrower with an overdue item accruing fines, a lost item and
an item with a rental fee. Confirm the Fines column on the OPAC summary
page now shows you what you may expect to see for each item.

Sponsored-by: Catalyst IT
Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>