Bug 12927: Problems with item information tab on acq order from staged page

Bug 12927: Problems with item information tab on acq order from staged page

This patch fixes a regression introduced (by me)
on Bug 12673.

I adds the code needed to display properly all fields

To test:
1) Check that 'AcqCreateItem' syspref is set to 'placing an order'
2) Satage a file with some items
3) Go to a Vendor, create a basket, clic add from staged file, select your file
4) On 'Item information' tab fields are displayed wrong

5) Apply the patch

6) Reload, display must now be fixed

Signed-off-by: Paola Rossi <paola.rossi@cineca.it>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>