Fix import order with ESLint

Port d27216dc46 to glitch-soc

app/javascript/flavours/glitch/components/dismissable_banner.jsx

@@ -1,9 +1,12 @@
-import { PureComponent } from 'react';
-import { IconButton } from './icon_button';
 import PropTypes from 'prop-types';
+import { PureComponent } from 'react';
+
 import { injectIntl, defineMessages } from 'react-intl';
+
 import { bannerSettings } from 'flavours/glitch/settings';
 
+import { IconButton } from './icon_button';
+
 const messages = defineMessages({
   dismiss: { id: 'dismissable_banner.dismiss', defaultMessage: 'Dismiss' },
 });