1. Remove all `waitFor` hidden states for the post-dismiss toast:
something about Playwright is making toasts hang in a way I've never
seen in real use. Not something I'm worried about, and we still test
that the toast fires the first time we dismiss.
2. Remove all `scene.connectionEstablished()` calls. This has me more
worried because some of the flakiness on this front seems like we're not
able to handle the rapid machine-speed navigation and overwriting that
this test does when it doesn't have to `waitFor` toasts to disappear.
But that is not the point of this test, which is just to ensure the
onboarding plays correctly and initiates correctly.
8a03413643