fix #829 ignore events from menu span elements

Author: redonkulus

site/static/css/main.css

@@ -348,6 +348,7 @@ code {
         .menu-link span:before,
         .menu-link span:after {
             background-color: #fff;
+            pointer-events: none;
             width: 100%;
             height: .2em;
             -webkit-transition: all 0.4s;

site/static/layouts/side-menu/styles.css

@@ -185,6 +185,7 @@ small screens.
     .menu-link span:before,
     .menu-link span:after {
         background-color: #fff;
+        pointer-events: none;
         width: 100%;
         height: 0.2em;
     }