Bug 22116: Add price formatting to rental charge and replacement price on items tab...

Bug 22116: Add price formatting to rental charge and replacement price on items tab in staff

Adds formatting to replacement price and rental charge on items
tab.

To test:
- Add a rental charge to one or more of your item types
- Edit a record with some items, add replacement cost to some
- Find or create a record with your rental charged itemtype (MARC21:942$c)
- Go to the staff detail page of those records
- Check "Items" tab for
  - Rental charge on top
  - Replacement price for items
- Verify information is displayed correctly when toggling CurrencyFormat
  system preference

Signed-off-by: Jack Kelliher <jke0429@stacmail.net>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>