Bug 22468: Standardize on labelling ccode table columns as Collections

Bug 22468: Standardize on labelling ccode table columns as Collections

We now display the descriptions everywhere, so we should drop the
'code' from labels.

This changes text in a lot of playes in Koha, including:

- The relatives checkouts table when displayed for the guarantor
- The new order and order receive forms in acquisitoins (item creation)
- The description of CCODE in the authorised values table
- The column description on results in item search
- The branch tranfers page
- Course reserves: add reserve items (one and in batch)
- Patron account > statistics tab

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>