Use explicit Toggle Menu button

index.html

@@ -33,7 +33,13 @@ this repository contains the full copyright notices and license terms. -->
                         <span class="icon-bar"></span>
                         <span class="icon-bar"></span>
                     </button>
-                    <a class="navbar-brand" href="#" data-toggle="offcanvas">Tryton</a>
+                    <a class="navbar-brand" href="#">Tryton</a>
+                    <p class="pull-left visible-xs visible-sm navbar-text">
+                        <button type="button" class="btn btn-primary btn-xs"
+                            data-toggle="offcanvas">
+                            Toggle menu
+                        </button>
+                    </p>
                 </div>
                 <div class="collapse navbar-collapse" id="user_menu_collapse">
                     <ul class="nav navbar-nav">