Add hint to the requirements page's refresh button to restart the webserver

fixes #7839

modules/setup/application/views/scripts/form/setup-requirements.phtml

@@ -22,7 +22,7 @@ $requirements = $form->getRequirements();
       <td></td>
       <td class="btn-update">
         <div class="buttons">
-          <a href="<?= $this->href(); ?>" class="button-like"><?= mt('setup', 'Refresh'); ?></a>
+          <a title="<?= $this->translate('You may also need to restart the web-server for the changes to take effect!'); ?>" href="<?= $this->href(); ?>" class="button-like"><?= mt('setup', 'Refresh'); ?></a>
         </div>
       </td>
     </tr>