Improve the UI with FontAwesome icons

www/pad/inner.html

@@ -2,6 +2,7 @@
 <html>
 <head>
     <meta content="text/html; charset=utf-8" http-equiv="content-type"/>
+    <link rel="stylesheet" href="/bower_components/components-font-awesome/css/font-awesome.min.css">
     <script src="/bower_components/jquery/dist/jquery.min.js"></script>
     <script src="/bower_components/ckeditor/ckeditor.js"></script>
 </head>