Support items cannot have a slot assigned

So I found this bug:

​1. Go to the custom item pages 2. Add a support item in the page 3. The 6-squared grid does not appear on the top of the item. Interestingly it does appear on the other preseason items (e.g., Umbral) but not on anye of the support items. The real issue, I guess, is the fact that its "evolutions" are not even listed among the items, and since they provide wards, they are by far one of the most fitting items to make good use of the feature (i.e., automatical reorder in the bag so that I always have wards in slot 4).

Thank you for your attention.