## 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
break;
      case FunctionComponent:
        global.$r = {
          hooks,
          props,
          type,
        };
        break;
      case ForwardRef:
        global.$r = {
          props,
          type: type.render,
        };
        break;
      case MemoComponent:
      case SimpleMemoComponent:
        global.$r = {
          props,
          type:
            elementType != null && elementType.type != null
              ? elementType.type
              : type,
        };
        break;
      default:
        global.$r = null;
        break;
    }
  }
  function storeAsGlobal(