message: character set.
diff: <html>
  <head>
  <title>{{ appName }}</title>
  + <meta charset="utf-8" />
  <link rel="stylesheet" href="/_hal-browser/assets/css/main.css" type="text/css" />
  <link rel="stylesheet" href="/assets/form.css" type="text/css" />
  </head>
  