tpac : honor page locale in record detail copy grid

The query used to load the record detail copy grid now uses the same
locale value set as the default for all cstore-editor calls.  This
solves the issue where copy location names, statuses, etc. are not
properly translated.

Signed-off-by: Bill Erickson <berick@esilibrary.com>
Signed-off-by: Pasi Kallinen <pasi.kallinen@pttk.fi>
Signed-off-by: Mike Rylander <mrylander@gmail.com>