Don't link to loaded modules in the about page if the user doesn't have the required permission

refs #9381

application/controllers/AboutController.php

@@ -11,6 +11,7 @@ class AboutController extends ActionController
 {
     public function indexAction()
     {
+        $this->view->hasPermission = $this->hasPermission('config/modules');
         $this->view->version = Version::get();
         $this->view->modules = Icinga::app()->getModuleManager()->getLoadedModules();
     }

application/views/scripts/about/index.phtml

@@ -36,12 +36,12 @@
         $name = $module->getName();
       ?>
         <tr>
-          <td><?= $this->qlink(
+          <td><?= $hasPermission ? $this->qlink(
             $name,
             'config/module/',
             array('name' => $name),
             array('title' => sprintf($this->translate('Show the overview of the %s module'), $name))
-          ) ?></td>
+          ) : $name ?></td>
           <td><?= $module->getVersion() ?></td>
         </tr>
       <?php } ?>