fix menu capitalization to be consistent with core

simplemenu.module

@@ -22,7 +22,7 @@ function menu_bar_menu($may_cache) {
     
     $items[] = array(
       'path' => 'admin/settings/menu_bar',
-      'title' => t('menu bar'),
+      'title' => t('Menu bar'),
       'description' => t('Set which menus should appear in the menu bar.'),
       'callback' => 'drupal_get_form',
       'callback arguments' => array('menu_bar_admin_settings'),