## 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
flushPendingEvents(root);
        currentRootID = -1;
      });
    }
  }
  function handleCommitFiberUnmount(fiber) {
     T
     W
     w
    recordUnmount(fiber, false);
  }
  function handleCommitFiberRoot(root, priorityLevel) {
    const current = root.current;
    const alternate = current.alternate;
    currentRootID = getFiberID(getPrimaryFiber(current));
     B
     o
    if (trackedPath !== null) {
      mightBeOnTrackedPath = true;
    }
    if (traceUpdatesEnabled) {
      traceUpdatesForNodes.clear();
    }
     C
     w
    const isProfilingSupported = root.memoizedInteractions != null;
    if (isProfiling && isProfilingSupported) {
       I
       T
      currentCommitProfilingMetadata = {