Bug 34232: Make dropdown on additem page rescept display order

Bug 34232: Make dropdown on additem page rescept display order

To test:
1. EnableItemGroups
2. Find a record and add some new item groups with different display orders
3. Now edit an item on the record and scroll down to the dropdown underneath "+ Add to item group"
4. Notice that the values in the dropdown do not respect the display order.
5. Apply patch and restart_all
6. The display order should now be respected

Signed-off-by: Emily Lamancusa <emily.lamancusa@montgomerycountymd.gov>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 8065e3515abb79317f7c2dcddcb794529ffc9348)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>