Bug 26018: Fix frameworks errors with subfields in wrong tab

Bug 26018: Fix frameworks errors with subfields in wrong tab

All subfields for a MARC21 field should always be in the same tab.
There were some mistakes found by the "MARC bibliographic framework
test" this fixes.

Before you apply the patch:
- Check the "MARC bibliographic framework test" page
- Ideally you should see the "wrong tab" mistakes
- Reset your db (reset_all) or drop your db and run the web installer
- Verify the page no longer points out any issues

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Joonas Kylmälä <joonas.kylmala@helsinki.fi>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>