## 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 {displayName} = getData(internalInstance);
    const type = getElementType(internalInstance);
    let context = null;
    let owners = null;
    let props = null;
    let state = null;
    let source = null;
    const element = internalInstance._currentElement;
    if (element !== null) {
      props = element.props;
      source = element._source != null ? element._source : null;
      let owner = element._owner;
      if (owner) {
        owners = [];
        while (owner != null) {
          owners.push({
            displayName: getData(owner).displayName || 'Unknown',
            id: getID(owner),
            type: getElementType(owner),
          });
          if (owner._currentElement) {
            owner = owner._currentElement._owner;
          }
        }
      }
    }
    const publicInstance = internalInstance._instance;
    if (publicInstance != null) {
      context = publicInstance.context || null;
      state = publicInstance.state || null;