## 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
overrideHookState?: ?(
    fiber: Object,
    id: number,
    path: Array<string | number>,
    value: any,
  ) => void,
  
  overrideProps?: ?(
    fiber: Object,
    path: Array<string | number>,
    value: any,
  ) => void,
  
  scheduleUpdate?: ?(fiber: Object) => void,
  setSuspenseHandler?: ?(shouldSuspend: (fiber: Object) => boolean) => void,
  
  currentDispatcherRef?: CurrentDispatcherRef,
  
  
  getCurrentFiber?: () => Fiber | null,
  
  ComponentTree?: any,
  
  Mount?: any,
  ...
};
export type ChangeDescription = {|
  context: Array<string> | boolean | null,
  didHooksChange: boolean,