Bug 23063: Use Price formatting on amounts in item table in cataloguing

Bug 23063: Use Price formatting on amounts in item table in cataloguing

Koha can use CurrencyFormat for displaying price amounts and should do
so consistently everywhere. Without this patch price and replacement cost
will always display as xx.xx independent of CurrencyFormat setting in
the table above the edit items form. This patch fixes the table display.

To test:
* Apply patch
* Search or create a record with multiple items
* Fill in some price and replacement costs
* Try different settings of the CurrencyFormat system preference
* The display in the item table above the edit/add form should display
  according to the system preference
* Verify sorting works

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>