Bug 33608: (follow-up) Default value for interface column

Bug 33608: (follow-up) Default value for interface column

We should default to C4::Context->interface.

Test plan:
Login via intranet (see Bugzilla report).
Edit an item. Set to lost.
Check entry in statistics table on interface value.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>