Applet Test Bug848AppletGLCanvas01: Only use vsync-interval 1 for last GLJPanel
Bug 906 - JAWTWindow Component- and HierarchyListener must be detached at JAWTWindow.destroy() - GLCanvas Recreation Case

In case a JAWTWindow owner recreates itself, destroying JAWTWindow must detach the
Component- and HierarchyListener from the AWT component!

Test TestBug816GLCanvasFrameHoppingB849B889AWT
shows properly detaching listener at jawtWindow destruction.