eslint: enforce gaps between groups with import/order

app/soapbox/components/column_back_button.js

@@ -1,6 +1,7 @@
 import PropTypes from 'prop-types';
 import React from 'react';
 import { FormattedMessage } from 'react-intl';
+
 import Icon from 'soapbox/components/icon';
 
 export default class ColumnBackButton extends React.PureComponent {