Bug 14510: (QA followup) Fix bug with unmapped columns
Fall back more smoothly when items subfields are not mapped to a
kohafield. Note, however, that this development does not allow applying
default settings to subfields that aren't mapped. A note has been added
to the columns settings page, as there is no known workaround for this.
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org> Signed-off-by: Tomas Cohen Arazi <tomascohen@unc.edu.ar>