bugfix/ajax-blob

[EArminjon]

Smell like code issue. blob variable used previously was not defined. On blob, request.response contain a blob object, let's use it.

Connection with issue(s)

Resolve issue #2098

Connected to #2098

Testing and Review Notes

Screenshots or Videos

To Do

• double check the original issue to confirm it is fully satisfied
• add testing notes and screenshots in PR description to help guide reviewers
• request the "UX" team perform a design review (if/when applicable)

[EArminjon]

@pichillilorenzo

I wonder about the following code callback(null) :

I believe we should also give request.response because what will happen if reques.response exist and request.responseType is null ? We lost the result...