To make it reusable we need to move the code to datatables.js
So far only the cities table is using the column filters so there is no other
view to test.
Note that the existing implementation didn't work at all, and were base
on what is done on the detail.pl page (using table_filters.js)
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io> Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com> Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>