## 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
getInspectedElementPath={getInspectedElementPath}
          inspectedElement={inspectedElement}
          storeAsGlobal={storeAsGlobal}
        />
      )}
    </div>
  );
}
export type CopyPath = (path: Array<string | number>) => void;
export type InspectPath = (path: Array<string | number>) => void;
type InspectedElementViewProps = {|
  copyInspectedElementPath: CopyInspectedElementPath,
  element: Element,
  getInspectedElementPath: GetInspectedElementPath,
  inspectedElement: InspectedElement,
  storeAsGlobal: StoreAsGlobal,
|};
const IS_SUSPENDED = 'Suspended';
function InspectedElementView({
  copyInspectedElementPath,
  element,
  getInspectedElementPath,
  inspectedElement,
  storeAsGlobal,
}: InspectedElementViewProps) {
  const {id, type} = element;
  const {
    canEditFunctionProps,
    canEditHooks,
    canToggleSuspense,