GPII-722: Fixing problem with blank sentences.

http://issues.gpii.net/browse/GPII-722
I had actually meant what it was trying to hide, but I think I figured it out now. I believe it is trying to hide the arrow indicator showing which contrast theme is selected. Is this correct?
![capture](https://cloud.githubusercontent.com/assets/556024/3688279/5e9d589c-1334-11e4-97f0-deffa9f9cb76.PNG)