Bug 34905: Fix icon

Bug 34905: Fix icon

Test plan, on k-t-d:
1) Install FreeForm, run:
bash <(curl -s https://raw.githubusercontent.com/ammopt/koha-ill-dev/master/start-ill-dev.sh)

2) Create a new FreeForm ILL request:
http://localhost:8081/cgi-bin/koha/ill/ill-requests.pl?method=create&backend=FreeForm

3) Pick a request type and input "42" in cardnumber and select a random library.

4) Notice the "Place request with partners" icon is gone from the top action bar.

5) Apply patch. Repeat.

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>