This PR adds links to the [react-error-overlay](https://www.npmjs.com/package/react-error-overlay). This allows a developer to open a stack trace in its own editor. ![codelinking](https://user-images.githubusercontent.com/1265681/44278860-a63e0a80-a24f-11e8-9c69-c5365c026c58.gif) Closes #4813
Webpack 4, react-error-overlay, react-loadable (major)