revises custom group to use vanilla group as a demo

demo/collections/CustomComponents/components/fields/Group/Field/index.js

@@ -1,14 +1,12 @@
 import React from 'react';
 import PropTypes from 'prop-types';
+import { Group } from '../../../../../../../field-types';
 
-const CustomGroup = ({ onChange, value }) => {
+const CustomGroup = (props) => {
   return (
-    <input
-      className="custom-description-filter"
-      type="text"
-      onChange={e => onChange(e.target.value)}
-      value={value}
-    />
+    <div className="custom-group">
+      <Group {...props} />
+    </div>
   );
 };
 

field-types.js

@@ -1,5 +1 @@
-import Group from './src/client/components/forms/field-types/Group';
-
-export default {
-  Group,
-};
+export { default as Group } from './src/client/components/forms/field-types/Group';