Convert navigating the PB UI with the keyboard Nightwatch test to a functional JS test under PHPUnit

We currently have Nightwatch tests up and running again. The keyboard-based navigation support in Nightwatch is superior to what we can do in Mink / FunctionalJavaScript tests with PHPUnit.

I think this will probably eventually be Closed (won't fix) as we'll likely convert the Nightwatch tests to Playwright in 📌 Rewrite Nightwatch tests as Playwright Active .

Great to hear that new and superior solutions are being implemented, like Playwright here and Cypress elsewhere. The Drop is Always Moving!

This has turned out to be extremely hard, maybe impossible, in PHPUnit because Mink doesn't seem to have very clear or good keyboard support. Screw it. If we've got Nightwatch running, we can stick with that; hopefully we can go to Playwright in the future and that will make things easier on us.