message: fix loader css url
diff: <title>Cloudstack UI</title>
  <base href="/">
  <link rel="icon" type="image/x-icon" href="img/favicon.ico">
  - <link rel="stylesheet" href="/css/loader.css">
  + <link rel="stylesheet" href="css/loader.css">
  <link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
  <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=Intl.~locale.en,Intl.~locale.ru"></script>
  </head>
  