Issue in brief:
The overall audience refinement for a form-based (Target) campaign isn't shown/visible on the campaign's detail view.
Solution:
Make the overall audience refinement shown/visible on the campaign's detail view.
Details:
The overall audience refinement is visible (highlighted with a red box) while editing the form-based campaign as shown below:

The form-based campaign's detail view doesn't have this refinement as shown below:

So it would be nice to have it visible here.