remove xs

src/server/views/layout-kibela/base/layout.html

@@ -13,7 +13,7 @@
 
     <div id="main" class="main mt-5 col-md-7 col-xs-12 kibela-block bg-white round-corner {% if page %}{{ css.grant(page) }}{% endif %}{% block main_css_class %}{% endblock %}">
       <div class="row grw-subnav">
-        <div class="col-xs-12 grw-title-bar">
+        <div class="col-12 grw-title-bar">
           {% block content_header %} {% endblock %}
         </div>
       </div>