import PureRenderMixin from 'react-addons-pure-render-mixin'; import { FormattedMessage } from 'react-intl'; const outerStyle = { padding: '15px', fontSize: '16px', background: '#2f3441', flex: '0 0 auto', cursor: 'pointer', color: '#2b90d9' }; const iconStyle = { display: 'inline-block', marginRight: '5px' }; const ColumnBackButton = React.createClass({ contextTypes: { router: React.PropTypes.object }, mixins: [PureRenderMixin], handleClick () { this.context.router.goBack(); }, render () { return (