title: Is it possible to add user search filters to a ReferenceManyField in React Admin v3?
body: <p>With React Admin it is possible to add Filters to a List component. An example of this can be seen in the demo: <a href="https://marmelab.com/react-admin-demo/#/commands" rel="noreferrer">https://marmelab.com/react-admin-demo/#/commands</a></p>
  
  <p><a href="https://i.stack.imgur.com/QyUL8.png" rel="noreferrer"><img src="https://i.stack.imgur.com/QyUL8.png" alt="user search filters in List"></a></p>
  
  <p>The code for this particular component: <a href="https://github.com/marmelab/react-admin/blob/master/examples/demo/src/orders/OrderList.js" rel="noreferrer">https://github.com/marmelab/react-admin/blob/master/examples/demo/src/orders/OrderList.js</a></p>
  
  <pre><code>const OrderFilter = withStyles(filterStyles)(({ classes, ...props }) =&gt; (
  &lt;Filter {...props}&gt;
      &lt;SearchInput source="q" alwaysOn /&gt;
      &lt;ReferenceInput source="customer_id" reference="customers"&gt;
          &lt;AutocompleteInput
              optionText={choice =&gt;
                  `${choice.first_name} ${choice.last_name}`
              }
          /&gt;
      &lt;/ReferenceInput&gt;
      &lt;DateInput source="date_gte" /&gt;
      &lt;DateInput source="date_lte" /&gt;
      &lt;TextInput source="total_gte" /&gt;
      &lt;NullableBooleanInput source="returned" /&gt;
  &lt;/Filter&gt;));
  
  ...
  
  const OrderList = ({ classes, ...props }) =&gt; (
  &lt;List
      {...props}
      filterDefaultValues={{ status: 'ordered' }}
      sort={{ field: 'date', order: 'DESC' }}
      perPage={25}
      filters={&lt;OrderFilter /&gt;}
  &gt;
      &lt;StyledTabbedDatagrid /&gt;
  &lt;/List&gt;
  );
  </code></pre>
  
  <p>However, I can't figure out to add the same functionality to a <strong>ReferenceManyField</strong>. In the demo website this would for example be the Orders tab for a customer Edit component. Is there a way to configure a Filter component for the ReferenceManyField?</p>
  
  <p><a href="https://i.stack.imgur.com/IFDfv.png" rel="noreferrer"><img src="https://i.stack.imgur.com/IFDfv.png" alt="Orders tab"></a></p>