## 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 storeAsGlobal = useCallback<GetInspectedElementPath>(
    (id: number, path: Array<string | number>) => {
      const rendererID = store.getRendererIDForElement(id);
      if (rendererID !== null) {
        bridge.send('storeAsGlobal', {
          count: storeAsGlobalCount.current++,
          id,
          path,
          rendererID,
        });
      }
    },
    [bridge, store],
  );
  
  const copyInspectedElementPath = useCallback<GetInspectedElementPath>(
    (id: number, path: Array<string | number>) => {
      const rendererID = store.getRendererIDForElement(id);
      if (rendererID !== null) {
        bridge.send('copyElementPath', {id, path, rendererID});
      }
    },
    [bridge, store],
  );
  
  const getInspectedElementPath = useCallback<GetInspectedElementPath>(
    (id: number, path: Array<string | number>) => {
      const rendererID = store.getRendererIDForElement(id);
      if (rendererID !== null) {
        bridge.send('inspectElement', {id, path, rendererID});