## 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
hasLegacyContext,
    context,
    hooks,
    owners,
    props,
    source,
    state,
  } = inspectedElement;
  const {ownerID} = useContext(TreeStateContext);
  const bridge = useContext(BridgeContext);
  const store = useContext(StoreContext);
  const {
    isEnabledForInspectedElement,
    viewAttributeSourceFunction,
  } = useContext<ContextMenuContextType>(ContextMenuContext);
  const inspectContextPath = useCallback(
    (path: Array<string | number>) => {
      getInspectedElementPath(id, ['context', ...path]);
    },
    [getInspectedElementPath, id],
  );
  const inspectPropsPath = useCallback(
    (path: Array<string | number>) => {
      getInspectedElementPath(id, ['props', ...path]);
    },
    [getInspectedElementPath, id],
  );
  const inspectStatePath = useCallback(
    (path: Array<string | number>) => {
      getInspectedElementPath(id, ['state', ...path]);