Bug 35831: Move UpdateItemLocationOnCheckout to Checkout policy section

Bug 35831: Move UpdateItemLocationOnCheckout to Checkout policy section

This patch moves the UpdateItemLocationOnCheckout system preference from
the Checkin policy section of the circulation preferences to the
Checkout policy section.

To test:
1. Apply patch
2. Go to Administration > System preferences > Circulation
3. Check that UpdateItemLocationOnCheckout is under Checkout policy

The text should be the same as before, and the feature should not have changed.

Signed-off-by: Aude <aude.charillon@ptfs-europe.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>