This "history" button doesn't seem to work anymore.
link: https://dart-current-results.web.app/#/filter=language/async/await_flatten_test&showAll
In the example shown in the screenshot above, clicking the button takes me to the page
https://dart-current-results.web.app/#showLatestFailures=false&test=language/async/await_flatten_test.
It seems like something is wrong because it just looks like the Current Results homepage. I think this used to redirect to the history of the test so you can see when the results status changed.