edit the "invalid answer" look and feel

I'd love to be able to edit the Invalid Answer slide as easily as the Good and Wrong Answer slides...

Right now, I still cannot properly use Storyline's own questions because the "Invalid Answer" cannot be edited. I can edit every other prompt, such as Good Answer, Bad Answer, Thank you and such, but not the Invalid Answer. I have to use my own triggers and variables to block Storyline's own layers.

Is it planned at some some point? That is a tool that should have been added by now, right?

For record, there are slides for Correct Answer, Incorrect Answer, Retry, Review and Thanks.