## 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 symbolOrNumber =
      typeof type === 'object' && type !== null ? type.$$typeof : type;
    
    return typeof symbolOrNumber === 'symbol'
      ? symbolOrNumber.toString()
      : symbolOrNumber;
  }
  const {
    ClassComponent,
    IncompleteClassComponent,
    FunctionComponent,
    IndeterminateComponent,
    ForwardRef,
    HostRoot,
    HostComponent,
    HostPortal,
    HostText,
    Fragment,
    MemoComponent,
    SimpleMemoComponent,
    SuspenseComponent,
    SuspenseListComponent,
  } = ReactTypeOfWork;
  function resolveFiberType(type: any) {