cms/templates/cms/toolbar/items/item_sideframe.html
<li class="{% if active %}cms-toolbar-item-navigation-active{% endif %}{% if disabled %} cms-toolbar-item-navigation-disabled{% endif %} {{ extra_classes|join:' ' }}">
<a{% if disabled %} tabindex="-1"{% endif %} href="{{ url }}" data-rel="sideframe"{% if on_close %} data-on-close="{{ on_close }}"{% endif %}>
<span>{{ name }}<span class="cms-icon cms-icon-arrow"></span></span>
</a>
</li>