## 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
hooks,
            props,
            state,
          } = ((data.value: any): InspectedElementBackend);
          const inspectedElement: InspectedElementFrontend = {
            canEditFunctionProps,
            canEditHooks,
            canToggleSuspense,
            canViewSource,
            hasLegacyContext,
            id,
            source,
            type,
            owners:
              owners === null
                ? null
                : owners.map(owner => {
                    const [
                      displayName,
                      hocDisplayNames,
                    ] = separateDisplayNameAndHOCs(
                      owner.displayName,
                      owner.type,
                    );
                    return {
                      ...owner,
                      displayName,
                      hocDisplayNames,
                    };
                  }),