Bug 36443: Add a fax field / column to the batch patron modification tool

Bug 36443: Add a fax field / column to the batch patron modification tool

To test:
1. Create or modify an existing patron account so that they have a
   value in their fax number field.
2. Go to Tools > Batch patron modification
    1. Add the patron card number, or borrower number into the
       modification tool and click on continue. There is no option for
       modifying fax numbers, nor are fax numbers visible in the
       modification table.
3. Apply the patch and restart_all
4. Repeat step 2
    1. A column for ‘Fax’ is now visible after ‘Other phone’
    2. Test the ‘Fax’ field by clearing out the field with the checkbox.
       ‘Checking the box right next to the label will disable the entry
       and delete the values of that field on all selected patrons.’
    3. Test the ‘Fax’ field by updating the value with a new number
5. Sign off and have a wonderful day :)

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>