Order event updates by latest first

Events are ordered by latest event at the top, so I think it would be clearer if the updates within an event also were ordered so.

Currently it looks like this:

<img width="400" src="https://cloud.githubusercontent.com/assets/660706/4752432/56f9c8fa-5aab-11e4-8d27-8119987f661d.png">

This PR changes it to:

<img width="400" src="https://cloud.githubusercontent.com/assets/660706/4752441/6d44887a-5aab-11e4-9f07-fabaae63f21d.png">

What do you think?