## The current behavior

The full value of the `key` is very difficult / impossible to find and use in the interface of the React Devtools.

![Kapture 2020-04-22 at 11 47 47](https://user-images.githubusercontent.com/1935696/79997715-25222680-84ba-11ea-97ba-51f1679a8c91.gif)

Only managed to find it by accident :(

## The expected behavior

The `key` is visible in the props list to the right.

### Detailed Proposal

As mentioned below in https://github.com/facebook/react/issues/18702#issuecomment-617924196

Add a light divider and new section in the props panel to the right.

Potentially also add a question mark that shows an explanation about the fact that things in this section are not really props.

Ref (Original implementation): https://github.com/facebook/react-devtools/pull/328
const fiber = findCurrentFiberUsingSlowPathById(id);
    if (fiber !== null) {
      instance = fiber.stateNode;
      if (fiber.memoizedProps !== null) {
        style = fiber.memoizedProps.style;
      }
    }
    return {instance, style};
  }
  function inspectElementRaw(id: number): InspectedElement | null {
    const fiber = findCurrentFiberUsingSlowPathById(id);
    if (fiber == null) {
      return null;
    }
    const {
      _debugOwner,
      _debugSource,
      stateNode,
      memoizedProps,
      memoizedState,
      tag,
      type,
    } = fiber;
    const dependencies =
      (fiber: any).dependencies ||
      (fiber: any).dependencies_old ||
      (fiber: any).dependencies_new;
    const elementType = getElementTypeForFiber(fiber);
    const usesHooks =
      (tag === FunctionComponent ||