Use CodeMirror in /slide #2

Fix title errors in the slide app caused by the present mode

www/slide/index.html

@@ -32,6 +32,10 @@
             padding:0;
             overflow:hidden;
         }
+        #pad-iframe.fullscreen {
+            top: 0px;
+            height: 100% !important;
+        }
     </style>
 </head>
 <body>