setShowResizeBar and showContextMenu unpleasant effect with screen scrollbars

[Hirn]

I have a code example when when calling showContextMenu scrollbars appear for the entire screen. Is it possible to fix this error?

public void onModuleLoad() {
        HLayout mainLayout = new HLayout();
        mainLayout.setWidth100();
        mainLayout.setHeight100();

        Label navigationLabel = new Label();
        navigationLabel.setContents("Navigation");
        navigationLabel.setAlign(Alignment.CENTER);
        navigationLabel.setOverflow(Overflow.HIDDEN);
        navigationLabel.setWidth("30%");
        navigationLabel.setShowResizeBar(true);

        mainLayout.addMember(navigationLabel);

        VLayout vLayout = new VLayout();
        vLayout.setWidth("70%");

        VLayout listingLayout = new VLayout();
        listingLayout.setOverflow(Overflow.HIDDEN);
        listingLayout.setHeight("30%");
        listingLayout.setShowResizeBar(true);

        Label listingLabel = new Label();
        listingLabel.setContents("Listing");
        listingLabel.setAlign(Alignment.CENTER);
        listingLabel.setOverflow(Overflow.HIDDEN);
        listingLabel.setHeight("30%");

        Button menuButton = new Button("show menu");
        menuButton.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                MenuItem goProjectEditor = new MenuItem("menu item 1");
                MenuItem goPageEditor = new MenuItem("menu item 2");

                com.smartgwt.client.widgets.menu.Menu goEditor = new com.smartgwt.client.widgets.menu.Menu();
                goEditor.setItems(goProjectEditor, goPageEditor);
                goEditor.showContextMenu();
            }
        });
        listingLayout.addMember(listingLabel);
        listingLayout.addMember(menuButton);

        Label detailsLabel = new Label();
        detailsLabel.setContents("Details");
        detailsLabel.setAlign(Alignment.CENTER);
        detailsLabel.setOverflow(Overflow.HIDDEN);
        detailsLabel.setHeight("70%");

        vLayout.addMember(listingLayout);
        vLayout.addMember(detailsLabel);

        mainLayout.addMember(vLayout);
        mainLayout.draw();
    }