Audit: Suspected UX blocking XHRs

Many sites rely on an API call before rendering the final visually complete state. preview.starbucks.com is one such site.

This is a BIG antipattern, especially when this request is initiated late, so fixing it can have a massive improvement.

Identifying this is hard, and I think the best we can do is call some requests as "suspected", because we don't know with certainty that a request is neccessary.