Steps to reproduce

1. Launch app
2. Tap Material
3. Tap "Bottom app bar" or most/all others
4. Tap the list looking thing with tooltip of "API Documentation"
   Expected result: Something in the middle of the screen
   Observed result: hamburger three lines in upper left, label (e.g. Bottom Appbar) in app bar title, permanent snackbar with flutter version info at the bottom, middle of screen empty white canvas