LP1888723 Call number modification repair

LP1888723 Call number modification repair

Fixes an issues where modifying the call number label without modifying
any items would result in modifying the call number for all linked items
instead of the items actually loaded in the volcopy editor.

Also fixes a case where modifying call numbers failed to reflect
correctly in the catalog holdings view.

Signed-off-by: Bill Erickson <berickxx@gmail.com>
Signed-off-by: Ruth Frasur <rfrasur@library.in.gov>
Signed-off-by: Galen Charlton <gmc@equinoxOLI.org>