Bug 34748: Fix column name in columns configuration for basket table

Bug 34748: Fix column name in columns configuration for basket table

The first column was named basket_number, but it's actually the
order_line.

To test:
* Edit column configuration for acquisition > basket
* Make sure to set at least one checkbox for 'basket_number'
* Apply patch, run database update
* Verify that the first column is now 'order_line', but your
  settings have been preserved

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>