Bug 35098: Fix display of clickable batch name in ILL table

Bug 35098: Fix display of clickable batch name in ILL table

Test plan, k-t-d:
1) Install FreeForm and enable ILLmodule, run:
bash <(curl -s https://raw.githubusercontent.com/ammopt/koha-ill-dev/master/start-ill-dev.sh)
2) Install an ILL availability plugin (e.g. pubmed):
https://github.com/PTFS-Europe/koha-plugin-api-pubmed/releases/tag/1.1.1
3) restart plack:
koha-plack --restart kohadev
4) Create a new ILL batch, visit:
/cgi-bin/koha/ill/ill-requests.pl
5) Click '+New ILL requests batch'
6) Input a name, '42' on the cardnumber and pick a library. Click 'Continue'.
7) On the identifiers textarea, insert '123' and click 'Process identifiers'
8) After the metadata has been retrieved, click the bottom 'Add items to batch' button, click 'Finish and view batch'
10) Go back to ILL requests table, visit:
/cgi-bin/koha/ill/ill-requests.pl
11) On the top right of the table, click 'Columns' and enable Batch
12) Notice the batch column now shows correctly and is clickable

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>