## 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
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      while (next !== null) {
        if (next.memoizedState !== prev.memoizedState) {
          return true;
        } else {
          next = next.next;
          prev = prev.next;
        }
      }
    }
    return false;
  }
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    }
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      next.hasOwnProperty('memoizedState') &&
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    ) {
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    }
    const keys = new Set([...Object.keys(prev), ...Object.keys(next)]);
    const changedKeys = [];
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    for (const key of keys) {
      if (prev[key] !== next[key]) {