Bug 34618: Add sort 1 and 2 fields to basket in acquisitions

Bug 34618: Add sort 1 and 2 fields to basket in acquisitions

This patch adds the option to display sort1 and sort2 columns in the
view of the contents of a basket in acquisitions. The columns are
labeled "Statistic 1" and "Statistic 2" to match the labels in the
order creation/edit form.

The fields are hidden by default in the updated table configuration.

To test, apply the patch and restart services.

- Go to acquisitions and create a basket if necessary:
  - Search for a vendor and click New -> Basket from the vendor
    toolbar on the vendor search results screen.
  - Create a basket, then click "Add to basket" from the basket details
    page.
  - Add an order to the basket.
- With at least one order in the basket, check the table of orders in
  the basket.
- The columns should be unchanged.
- The table configuration button should show the two statistics fields
  as hidden. Test that they can be displayed.

- Go to Administration -> Table settings.
  - Under Acquisitions -> basket, try changing the settings for the
    Statistic 1 and Statistic 2 fields, and check that your changes are
    reflected in the basket view.

- Test with a vendor which has an EDI account:
  - Enable the EDIFACT system preference.
  - Go to Administration -> EDI accounts and create an account for your
    vendor.
  - Confirm that the table of orders in your basket still displays
    correctly now that the "Supplier report" column is present.

Signed-off-by: Michaela Sieber <michaela.sieber@kit.edu>
Signed-off-by: Ray Delahunty <r.delahunty@arts.ac.uk>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>