Bug 23800: (QA follow-up) Fix item case, reduce code

Bug 23800: (QA follow-up) Fix item case, reduce code

The solution for items does not work, since it compares barcodes.
Instead of a grep in a map, we could do simpler.

Test plan:
Try barcode file, order not by itemnumber. Toggle with case. Add wrong code.
Try same via barcode list text area.
Try an itemnumber file, reorder again. Add wrong number.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>