Fix missing tab labels

fixes #8518

application/controllers/ConfigController.php

@@ -121,7 +121,8 @@ class ConfigController extends ActionController
         // @TODO(el): This seems not natural to me. Module configuration should have its own controller.
         $this->view->tabs = Widget::create('tabs')
             ->add('modules', array(
-                'title' => $this->translate('Modules'),
+                'label' => $this->translate('Modules'),
+                'title' => $this->translate('List intalled modules'),
                 'url'   => 'config/modules'
             ))
             ->activate('modules');

application/controllers/DashboardController.php

@@ -249,7 +249,8 @@ class DashboardController extends ActionController
                 $this->view->tabs->add(
                     'Add',
                     array(
-                        'title' => '+',
+                        'label' => '+',
+                        'title' => 'Add a dashlet to an existing or new dashboard',
                         'url'   => Url::fromPath('dashboard/new-dashlet')
                     )
                 );

modules/doc/application/controllers/StyleController.php

@@ -24,13 +24,14 @@ class Doc_StyleController extends Controller
         return Widget::create('tabs')->add(
             'guide',
             array(
-                'title' => $this->translate('Style Guide'),
+                'label' => $this->translate('Style Guide'),
                 'url'   => 'doc/style/guide'
             )
         )->add(
             'font',
             array(
-                'title' => $this->translate('Icons'),
+                'label' => $this->translate('Icons'),
+                'title' => $this->translate('List all available icons'),
                 'url'   => 'doc/style/font'
             )
         );