JEP: JavaFX controls in the title bar

[Michael Strauß]

> Sounds like a good idea, maybe stage.setHeaderBar(), which can be the HeaderBar provided or a custom Control (any control, or that extends HeaderBar, because the reserved space on Mac).
>
> This also limits the control usage on the top.

What would be the advantage of this, compared to the proposal?
How does this interact with the scene graph?
How would I create a control that extends from the client area all the
way into the header area?