Bug 15139: Add non-public item notes to overdue report

Bug 15139: Add non-public item notes to overdue report

Sometimes libraries want to see internal notes on the overdue
reports page, this patch adds the notes.

Additional fixes:
- Library column was always empty, now library displays
- Replacement price was not formatted according to CurrencyFormat

To test:
- Make sure you have some overdue issues in your system
- Circulation > Overdues report
- Make sure everything displays as it should
  - Verify internal item note shows
  - Verify price is correctly formatted (syspref CurrencyFormat)
  - Library shows
- Download list of overdues
  - Verify the new column displays

Signed-off-by: Spencer <ssmith3@mckinneytexas.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Amended patch: remove the branchcode line, added on its own bug report,
see bug 21463

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>