Summaries are expandable in Chrome

- [fix] Summaries are expandable in Chrome on Tablet/Desktop in live blogs

To reproduce the bug, try to show the full summary in the sidebar in this live blog: http://www.theguardian.com/business/2013/dec/04/banks-braced-for-new-rate-rigging-fines-tesco-sales-slide-business-live

For some reason Chrome does not register the click on a label if performed on a button or an anchor: http://codepen.io/kaelig/pen/ksxlb

Incidentally, the click may not be registered by our tracking script. Any suggestion?

![ ](http://i.imgur.com/zCtMzFa.gif)