[Feature Request] Implement prominent scroll functionality for App Bar component

[joshas]

Problem to solve

After migration from Vuetify v2 "prominent" prop does not work on App Bar component (height doesn't change on scroll down), and layout is incomplete (action buttons should be aligned to top, no they are center aligned).

Proposed solution

I understand that there's some "catch" why this functionality was hard to implement during initial port, so it would be nice to have explanation what already was attempted, for anyone who might be interested to pick up this task. Using scroll directive comes to mind, also looking at scroll-behavior prop might provide some insight.
Until then, it would be nice to add a warning to documentation, explaining that this prop is "under construction".