Bug 19974: Make MarkLostItemsAsReturned multiple

Bug 19974: Make MarkLostItemsAsReturned multiple

Given the confusion regarding this behaviour it sounds better to make it
configurable.
This pref will take 4 different values, 1 per place an item can be
marked as lost.

Test plan:
Mark items as lost and confirm the item is returned or not, depending on
the value of the system preference.

- from the longoverdue cronjob (--mark-returned takes precedence if set)
- from the batch item modification tool
- when cataloguing an item
- from the items tab of the catalog module

Signed-off-by: Séverine QUEUNE <severine.queune@bulac.fr>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>