Bug 34486: Show OPAC Column Due Date only if items on loan exist

Bug 34486: Show OPAC Column Due Date only if items on loan exist

This patch updates the OPAC bibliographic detail page so that in the
holdings table, the following columns are hidden if they contain no
data: Call number, date due, materials, checkouts, barcode,
and item-level holds.

To test, apply the patch and restart services.

- In the staff interface, go to Administration -> System preferences.
- Search for OPACShowHoldQueueDetails and set it to "Show holds and
  their priority level."
- Search for OPACShowHoldQueueDetails and set it to "Show holds and
  their priority level."
- In the OPAC, locate a bibliographic record with multiple items.
- View the detail page and confirm that the holdings table doesn't show
  these columns if there is no data in any of the rows: Call number,
  date due, materials, barcode, and item-level holds
- For each of the affected fields, update the record the record so that
  there is data to be shown for at least one of the items:
  - Edit an item to add: call number, materials specified, barcode
  - Check out an item to someone in order to show the date due column
  - Place an item-level hold on one of the items to show the item holds
    column.
- Go to Administration -> Table settings -> OPAC -> biblio-detail and
  configure some columns to be hidden by default. Confirm that your
  changes are correctly shown in the OPAC holdings table.

Sponsored-by: Athens County Public Libraries
Signed-off-by: Michaela Sieber <michaela.sieber@kit.edu>
Signed-off-by: Paul Derscheid <paul.derscheid@lmscloud.de>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>