jfx

8376492: NullPointer in ContextMenu sub-menu when graphic and style classes are changed while the menu is open

8377427: Reduce substring allocations in Color.web(String, double)

8378507: JavaFX CSS Reference skips heading levels: <h2> followed by <h4>

8378366: Accessibility issues in CSS Reference Guide and Introduction to FXML

8378359: Remove unused local variable in ViewContainer::HandleViewMouseEvent