Bug 37177: "item" should be "record" in list page

Bug 37177: "item" should be "record" in list page

This patch rewords areas of the lists and cart templates so that the
term "record" is preferred over "item" when referring to a bibliographic
record.

To test, apply the patch and go to Lists in the staff interface.

- If necessary, create a new list.
- From the list contents view, click "Add records" in the toolbar.
  - Submit some valid barcodes and biblionumbers
  - After adding biblionumbers you should see the message "The record
    ( [number] ) has been added to the list"
  - After adding barcodes you should see the message "The record for
    this item ( [barcode] ) has been added to the list"
- Click "Add records" again
  - Submit some of the same barcodes and biblionumbers
    - You should see these messages:
      - "The record for this item ( [barcode] ) has not
         been added to the list. Please verify it is not already in the
         list."
      - "The record ( [number] ) has not been added to the
        list. Please verify it is not already in the list.
- Check the checkbox for one or more titles on your list and click
  "Remove selected"
  - You should see the message, "The record has been removed from the
    list."
- Perform a catalog search and from the results screen, select one or
  more results and add them to the cart.
  - Open the Cart and confirm that the controls at the top of the table
    of titles reads "Selected records: ..."

Sponsored-by: Athens County Public Libraries
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>