Fixed navigation bar when many events are pending

It also works better in various resolutions.
![screenshot 2014-09-23 21 57 27](https://cloud.githubusercontent.com/assets/20943/4379015/f6a0ecc8-435c-11e4-9782-646e4c9ab0f8.png)
![screenshot 2014-09-23 21 57 38](https://cloud.githubusercontent.com/assets/20943/4379019/f8bc74b4-435c-11e4-9f77-5b45f35b7b40.png)
![screenshot 2014-09-23 21 57 47](https://cloud.githubusercontent.com/assets/20943/4379021/fab1bf68-435c-11e4-82f1-a5a6054fe81a.png)
![screenshot 2014-09-23 21 57 54](https://cloud.githubusercontent.com/assets/20943/4379027/fed04ee8-435c-11e4-96ba-6b11282386e3.png)


Fixes #498