Bug 28190: Fix columns_settings.yml itemtypes entry

Bug 28190: Fix columns_settings.yml itemtypes entry

The parent_code column is missing on the columns_settings.yml file, so
columns are shifted and thus 'Library limitations' is not toggable.

To test:
1. Verify you are not offered the chance to hide the column
2. Apply this patch, restart all the things
=> SUCCESS: You can toggle the column
3. Sign off :-D

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>