LayedComponentMixin example is less ugly
LayedComponentMixin example is less ugly

Test Plan: Built and viewed docs. Played around with example, resizing page, etc.

redsunsoft/react-components,sloria/react-components,vasanthk/react-components,quicktoolbox/react-components,Khan/react-components,jepezi/react-components,Khan/react-components,sloria/react-components,vasanthk/react-components,redsunsoft/react-components,quicktoolbox/react-components,sloria/react-components,jepezi/react-components,quicktoolbox/react-components,redsunsoft/react-components,Khan/react-components,vasanthk/react-components,jepezi/react-components