Allow text to expand

Trying to fix this:

![no-wrap](https://cloud.githubusercontent.com/assets/72159/3421024/41fa1110-fed2-11e3-84cf-99d624649abe.png)

The autolayout alone doesn't seem to cut it, even though constraints are pretty relaxed about height of that field.

I've also tried subclassing:

http://stackoverflow.com/questions/10463680/how-to-let-nstextfield-grow-with-the-text-in-auto-layout

but I'm not sure if it worked at all, since I just kept getting field that's always 2 lines high.

Any ideas?