Prevent Stretching

When the GUI is re-sized, all the lines of the interface stretch out vertically. I talked to Joseph at the code sprint about this and he thought it was a good idea. 

Related to issue <a href=https://github.com/Freeseer/freeseer/issues/411">#411</a>

- [x] change the stretching patterns
- [x] squash commits
- [x] change commit message

![untitled](https://f.cloud.github.com/assets/6126960/2380369/96db2c2a-a8a9-11e3-98ca-09531f64abf0.png)