<!-- Graciously derived from https://www.codeply.com/go/3e0RAjccRO/bootstrap-4-collapsing-sidebar-menu -->
<div id="sidebar-container" class="sidebar-expanded d-none d-md-block">
    <ul class="list-group">

        {%- for category in site.nav.categories -%}
            <li class="list-group-item sidebar-separator-title text-muted d-flex align-items-center menu-collapsed">
                <small>{{ category.name | upcase }}</small>
            </li>
            {%- for group in category.groups -%}
        