Steps to reproduce:

1. Have a host with discovered and normal items
2. Open new graph creation form.
3. Click "Add" for item.
4. Observed: Both discovered and normal items selectable.
5. Select an item.
6. Click on it to edit it.

Result:
In item selection popup there is only normal item.
Expected:
Same items as in Add popup are visible, when editing. (both discovered and normal items)