Prevent click's event (on a calendar) to propagate

In this situation, on Ionic framework:
![image](https://cloud.githubusercontent.com/assets/1862580/2765548/b185213c-ca25-11e3-9ab0-b19c8c94775c.png)
when I click on f.e. day no 12, the calendar changes the day (ok), hides the popup (ok), but the event propagates to upper scope and in the same time "Post it!" button is clicked in submitted (not ok).

This fixes it but shouldn't remove any previous behaviour.