{{! Contents of the "all messages sidebar" popup }}
<ul class="nav nav-list">
<li>
{{! tabindex="0" Makes anchor tag focusable. Needed for keyboard support. }}
<a tabindex="0" id="mark_all_messages_as_read">
<i class="fa fa-book" aria-hidden="true"></i>
{{#tr this}}Mark all messages as read{{/tr}}
</a>
</li>
</ul>