icingaweb2/application/views/scripts/config/application.phtml

<div class="controls" data-base-target="_main">
  <?= $this->tabs->render($this); ?>
</div>
<div class="content">
  <h1 tabindex="-1" id="application-configuration">
    <?= $this->translate('Generic Configuration'); ?>
  </h1>
  <?php if (isset($this->messageBox)): ?>
    <?= $this->messageBox->render() ?>
  <?php endif ?>
  <?= $this->form ?>
</div>