Bug 296565 Make group creation an advanced option in the folder
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/wizards/newresource/BasicNewGroupResourceWizard.java
mainPage = new WizardNewGroupMainPage(ResourceMessages.NewGroup_text, getSelection()); 
        addPage(mainPage);
    }
    /* (non-Javadoc)
     * Method declared on IWorkbenchWizard.
     */
    public void init(IWorkbench workbench, IStructuredSelection currentSelection) {
        super.init(workbench, currentSelection);
        setWindowTitle(ResourceMessages.NewGroup_title);
        setNeedsProgressMonitor(true);
    }
    /* (non-Javadoc)
     * Method declared on BasicNewResourceWizard.
     */
    protected void initializeDefaultPageImageDescriptor() {
        ImageDescriptor desc = IDEWorkbenchPlugin.getIDEImageDescriptor("wizban/newgroup_wiz.png");
        setDefaultPageImageDescriptor(desc);
    }
    /* (non-Javadoc)
     * Method declared on IWizard.
     */
    public boolean performFinish() {
        IFolder folder = mainPage.createNewGroup();
        if (folder == null) {
			return false;
		}
        selectAndReveal(folder);
        return true;
    }
}