Bitcoin: Make it work for different themes.

The bitcoin IAs don't work well with other themes. This should fix that.

@chrismorast @bsstoner @sdougbrown 

![screen shot 2014-06-13 at 5 51 32 pm](https://cloud.githubusercontent.com/assets/81969/3276141/f6f5f082-f344-11e3-90fb-9e5fc16a75c0.png)
![screen shot 2014-06-13 at 5 51 47 pm](https://cloud.githubusercontent.com/assets/81969/3276142/f6f61562-f344-11e3-80c6-b0194a7780fd.png)