Improved offline handling

app/scenes/ErrorOffline.js

@@ -0,0 +1,17 @@
+// @flow
+import * as React from 'react';
+import CenteredContent from 'components/CenteredContent';
+import PageTitle from 'components/PageTitle';
+import Empty from 'components/Empty';
+
+const ErrorOffline = () => {
+  return (
+    <CenteredContent>
+      <PageTitle title="Offline" />
+      <h1>Offline</h1>
+      <Empty>We were unable to load the document while offline.</Empty>
+    </CenteredContent>
+  );
+};
+
+export default ErrorOffline;