fixed height header, topic map alignment

before 

![screenshot 2014-06-29 10 40 45](https://cloud.githubusercontent.com/assets/1681963/3423524/7f768bbc-ff9b-11e3-940d-0baac3b4202b.png)

after 

![screenshot 2014-06-29 10 41 08](https://cloud.githubusercontent.com/assets/1681963/3423525/839f791a-ff9b-11e3-9d04-b1ce1dd424c0.png)