Reviewed-by: uta

Summary: retain rotation upon change to full screen mode
Reviewed-by: art, anthony

6880694: GraphicsDevice.setFullScreenWindow(null) throws NPE if there's a fullscreen window displayed
Summary: handle "empty" refresh rates
Reviewed-by: art, anthony

Summary: Introduced InvocationEvent.isDispatched method
Reviewed-by: art, anthony

Reviewed-by: art, dcherepanov

Reviewed-by: uta, ant

Summary: Introduce validate roots in AWT
Reviewed-by: alexp, art, dcherepanov

Reviewed-by: dcherepanov