roundcubemail/skins/elastic/templates/includes/footer.html

<roundcube:if condition="!env:framed || env:extwin" />
</div>
<roundcube:if condition="config:support_url" />
<a href="<roundcube:var name='config:support_url' />" target="_blank" id="supportlink" class="hidden"><roundcube:label name="support" /></a>
<roundcube:endif />
<roundcube:endif />

<roundcube:object name="message" id="messagestack" />

<script src="/bootstrap/bootstrap.bundle.min.js"></script>
<script src="/ui.js"></script>

</body>
</html>