Sync plugin3-public jar and source files
Add NativeWindowFactory.getLocationOnScreen(NativeWindow nw) to retrieve the NativeWindow location on screen
NativeWindowFactory.createWrappedWindow [WrappedWindow]: Using UpstreamSurfaceHookMutableSizePos to take position into account; WrappedWindow: invalidate and destroy - display device could be opened.
NewtFactory: Cleanup / createWindow(..) w/ parentWindow variant shall fall back to top-level ctor if parentWindow is null
Adapt to new plugin3 / Use browser window's location on screen for top-level window.
applet3 test page: remove redundant 'Applet3' in link name