#3671 hide the sidebar on xs as well as s.

src/themes/clean/templates/cms/page.html

@@ -14,7 +14,7 @@ <h1 id="cms-title">{{ page.display_name }}</h1>
                 <div id="main_article">{{ page.content|safe }}</div>
             </div>
             {% if page.display_toc %}
-                <div class="col-md-4 d-sm-none d-md-block">
+                <div class="col-md-4 d-none d-sm-none d-md-block">
                     <div class="sticky-top">
                         <h2>{% trans "Table of Contents" %}</h2>
                         <ul id="toc" class="table-of-contents"></ul>