making nav toggle larger

assets/themes/bootstrap-3/css/style.css

@@ -137,8 +137,10 @@ ul.nav li a.active {
 }
 
 .navbar-toggle .icon-spacer {
+  display: block;
   width: 37px;
   height: 3px;
+  border-radius: 1px;
 }
 
 .social a {