Add manifest.json, icons and install button, flatten client/src

client/js/components/ui/formik/Error.js

@@ -0,0 +1,8 @@
+import React from 'react';
+import { ErrorMessage } from 'formik';
+
+const Error = props => (
+  <ErrorMessage component="div" className="form-error" {...props} />
+);
+
+export default Error;