Manage custom menu for an Editor?

Question

I've a problem with permission. Is there a specific permission to let an user with Editor Role, manage the custom menu of a theme, and only this options?

The item that is under Appereance -> Menu, to be clear.

I'm using the capability plugin. Must I write a custom hook to enable only the use of custom menu editor ?

TIA

Edit: I've code a simple solution. See below my answer!

Answer 1

You need to give the editor role the 'edit_theme_options' permission, but that will also unlock other theme options like widgets to those users.

Answer 2

Ok, I've found a way, using the admin_menu action. I post here, in case someone needs it.

This code remove for a specific user all the submenus items except the one for the custom menus in the Appereance menu.

add_action('admin_menu', 'enable_only_custom_menu');

function enable_only_custom_menu() {
    global $menu,$submenu;
    global $current_user;
    get_currentuserinfo();

    if ($current_user->user_login == 'username') {
        foreach($submenu['themes.php'] as $key=>$smenu) {
            if ($smenu[2] != 'nav-menus.php') {
                unset($submenu['themes.php'][$key]);
            }
        }
    }
}

You must iterate the submenu for the key 'themes.php' and deleting all the items that are not interisting for you.