Fix text topic title when resize 

Before change
![untitled](https://f.cloud.github.com/assets/5206207/1165994/6d71c43c-2075-11e3-8f6b-a1516fe21bf3.png)
After change
![untitled1](https://f.cloud.github.com/assets/5206207/1166000/7d40a608-2075-11e3-8877-273ef2174ae7.png)