Fix #243 by importinf Field in Form.js in the React generator

Author: walva

templates/react/components/foo/Form.js

@@ -1,5 +1,5 @@
 import React, { Component } from 'react';
-import { reduxForm } from 'redux-form';
+import { Field, reduxForm } from 'redux-form';
 import PropTypes from 'prop-types';
 
 class Form extends Component {