## 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
}
      default:
        return null;
    }
  }
  function updateContextsForFiber(fiber: Fiber) {
    switch (getElementTypeForFiber(fiber)) {
      case ElementTypeClass:
        if (idToContextsMap !== null) {
          const id = getFiberID(getPrimaryFiber(fiber));
          const contexts = getContextsForFiber(fiber);
          if (contexts !== null) {
            idToContextsMap.set(id, contexts);
          }
        }
        break;
      default:
        break;
    }
  }
   Differentiates between a null context value and no context.
  const NO_CONTEXT = {};
  function getContextsForFiber(fiber: Fiber): [Object, any] | null {
    switch (getElementTypeForFiber(fiber)) {
      case ElementTypeClass:
        const instance = fiber.stateNode;
        let legacyContext = NO_CONTEXT;
        let modernContext = NO_CONTEXT;
        if (instance != null) {
          if (