Bug 34773: (follow-up) Missed templates

Bug 34773: (follow-up) Missed templates

This patch fixes three templates I missed the first time around:
Inventory, MARC diff view, and Upload local cover images.

- Cataloging -> Inventory and the results page after submitting a
  batch of barcodes.
- Cataloging -> Manage staged records -> Select a batch which includes
  record matches: Click the "View" link in the "Diff" column for a
  record which has a match.
- Cataloging -> Upload local cover image (with LocalCoverImages enabled)

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>