Remove shadow and disable hovering on mobile view

core/static/core/navbar.scss

@@ -126,10 +126,13 @@ nav.navbar {
 
       ul.content {
         list-style-type: none;
-        box-shadow: 3px 3px 3px 0 #dfdfdf;
         background: white;
         margin: 0;
 
+        @media (min-width: 500px) {
+          box-shadow: 3px 3px 3px 0 #dfdfdf;
+        }
+
         >li>a {
           display: flex;
           padding: 15px 20px;