Bug 8205 Missing mnemonic: Outline View->Open Super Implementation
Select a method in the outline view. "Open Super Implementation" on the popup menu is missing a mnemonic.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/actions/OpenExternalJavadocAction.java
return null;
			}
			if (type == IJavaElement.IMPORT_DECLARATION) {
				return elem;
			}
			IPackageFragmentRoot root= JavaModelUtil.getPackageFragmentRoot(elem);
			if (JavaDocLocations.getJavadocLocation(root.getPath()) != null) {
				return elem;
			}
		}
		return null;
	}
	
	public void run() {
		IJavaElement element= getDocumentedElement();
		if (element == null) {
			return;
		}
		try {
			URL url= JavaDocLocations.getJavaDocLocation(element);
			if (url != null) {
				openInBrowser(url, JavaPlugin.getActiveWorkbenchShell());
			}
		} catch (CoreException e) {
			JavaPlugin.log(e);
			String title= "Open External Javadoc";
			String message= "Opening Javadoc failed. See log for details.";
			ErrorDialog.openError(JavaPlugin.getActiveWorkbenchShell(), title, message, e.getStatus());
		}
	}