Bug 10820: display item status as lost if item is both lost and on loan

In the OPAC, if an items is both lost and checked out, it will show as
lost on the search results, and checkout out in the record details. The
lost status should take precedence over the checked out status, as the
checked out status may lead a patron to believe the book may return
soon.

Test Plan:
1) Check an item out to a patron
2) Set it to lost ( requires itemlost to be revealed in the framework
    for the items editor ).
3) Rebuild your zebra indexes
4) Run a search where that item is in the results list
5) Note the item is marked as lost
6) View the record details
7) Note the item is listed as "checked out"
8) Apply this patch
9) Repeat steps 4-6, note the item is now listed as lost

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>