related_modal_active=True doesn't return the new object

[MehdiCHEBBAH]

This happens when opening two modals in the same time (When creating an instance using a modal, we need to create another instance inside of it, this second instance is not returned to the first modal properly) it just blocks on the second modal (Even if the instance is created)

Here is the log of JS console (So I think the problem is just on the frontend)

Uncaught ReferenceError: SelectBox is not defined
    at dismissAddRelatedObjectPopup (RelatedObjectLookups.js:140:13)
    at popup_response.js:43:27
    at popup_response.js:52:3