removed old mobile UI

templates/header.html

@@ -6,5 +6,5 @@
         <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css">
         <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
         <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
-        <link rel="stylesheet" content="text/css" href="/static/css/main.css"/>
+        <link rel="stylesheet" content="text/css" href="/static/css/main.css?ver=2"/>
     </head>