**Do you want to request a *feature* or report a *bug*?**

Feature.

**What is the current behavior?**

The new DevTools doesn't show the component file path as did the v3 version.

**What is the expected behavior?**

It would be great to show the component file path, it's a really important feature when working in a large codebase.

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**

React DevTools v4 is affected, v3 had it.

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow
 */
import React, {useCallback, useContext} from 'react';
import {TreeDispatcherContext, TreeStateContext} from './TreeContext';
import {BridgeContext, StoreContext} from '../context';
import Button from '../Button';
import ButtonIcon from '../ButtonIcon';
import HooksTree from './HooksTree';
import {ModalDialogContext} from '../ModalDialog';
import HocBadges from './HocBadges';
import InspectedElementTree from './InspectedElementTree';
import {InspectedElementContext} from './InspectedElementContext';
import ViewElementSourceContext from './ViewElementSourceContext';
import NativeStyleEditor from './NativeStyleEditor';
import Toggle from '../Toggle';
import Badge from './Badge';
import {
  ComponentFilterElementType,
  ElementTypeClass,
  ElementTypeForwardRef,