Bug 16810: Fines note not showing on checkout

Bug 16810: Fines note not showing on checkout

Fines did not show on patron checkout and detail pages unless amout
was greater than syspref NoIssueCharges.

This patch fixes the logic in
koha-tmpl/intranet-tmpl/prog/en/includes/blocked-fines.inc

Additionally, it changes links to buttons and makes some small
text changes to ease translation.

To test:
- Apply patch
- Display checkout or detail page and verify proper display for
   a patron who has
   - no fines (no message)
   - fines not exceeding syspref NoissueCharges (message)
   - fines exceeding syspref NoIssueCharges (message)

Signed-off-by: Hector Castro <hector.hecaxmmx@gmail.com>
Works as advertised

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>