BASELINE alignment incompatible with fill-height resizing for HBox, FlowPane, GridPane

- run application attached: there is TabPane,TitledPane and ScrollBar inside of HBox with setAlignment(Pos.BASELINE_CENTER);
- try to move bar of ScrollBar

observe: TitledPane and ScrollBar are moved down
expected: moving of "bar" of ScrollBar should not affect layout

(slightly other behavior without TitledPane: ScrollBar shifted down once after attempt to scroll it. this is a bug too).