Bug 16681 - Allow update of opacnote via batch patron modification tool

Bug 16681 - Allow update of opacnote via batch patron modification tool

To test:
1 - Select a batch of patrons (via list, saved file, and cardnumber
        entry)
2 - Verify you cannot edit 'opacnotes' field, nor can you see
'borrowernotes' field in table, though you can edit it
3 - Verify editing works as expected
4 - Apply patch
5 - Select a batch via each method as above
6 - Note both note columns display in table
7 - Note that you can edit or clear the opacnotes field as expected
8 - Verify other feautres work as previously

Sponsored by:
   Lancaster Theological Seminary (https://lancasterseminary.edu/)

Followed test plan, works as expected.
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>