xmpp.chapril.org-conversejs/src/templates/bookmarks_list.html

<a href="#" class="rooms-toggle bookmarks-toggle" title="{{{o.desc_bookmarks}}}">
    <span class="fa {[ if (o.toggle_state === o._converse.OPENED) { ]} fa-caret-down {[ } else { ]} fa-caret-right {[ } ]}">
    </span> {{{o.label_bookmarks}}}</a>
<div class="bookmarks rooms-list {[ if (o.toggle_state !== o._converse.OPENED) { ]} hidden {[ } ]}"></div>