Added an button to hide the sidebar.

Feature wished by Mr.AtiX. That way you can view tables in full screen.

templates/base.html.twig

@@ -40,6 +40,9 @@
                 </div>
 
                 <div class="col-md-9 col-lg-10 offset-md-3 offset-lg-2 pl-0" id="main">
+                    <button class="btn btn-outline-dark btn-sm p-0" type="button" id="sidebar-toggle-button" title="{% trans %}sidebar.big.toggle{% endtrans %}">
+                        <i class="fas fa-angle-left"></i>
+                    </button>
                     <div class="container-fluid mr-0 pr-0" id="content">
                         <div id="content-data">
                             {# Here will be the real content be injected#}