refactor(features/ui): Avoid useless renders in WrappedSwitch (#5580)

app/javascript/mastodon/features/ui/util/react_router_helpers.js

@@ -7,11 +7,19 @@ import BundleColumnError from '../components/bundle_column_error';
 import BundleContainer from '../containers/bundle_container';
 
 // Small wrapper to pass multiColumn to the route components
-export const WrappedSwitch = ({ multiColumn, children }) => (
+export class WrappedSwitch extends React.PureComponent {
+
+  render () {
+    const { multiColumn, children } = this.props;
+
+    return (
       <Switch>
         {React.Children.map(children, child => React.cloneElement(child, { multiColumn }))}
       </Switch>
-);
+    );
+  }
+
+}
 
 WrappedSwitch.propTypes = {
   multiColumn: PropTypes.bool,