Bug 6407 reminder: register the context menu in the JavaOutlinePage
the context menu in the JavaOutlinePage should be registered with the page's site.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaOutlinePage.java
public boolean select(Viewer viewer, Object parentElement, Object element) {
					return !(element instanceof IField);
				}
			}; 
			
			class VisibilityFilter extends ViewerFilter {