Break long words in operator shelf listing page (bug 1106098)

Before: http://screencast.com/t/eiytNhQg

After:

![screen shot 2014-12-01 at 10 57 06 am](https://cloud.githubusercontent.com/assets/23885/5251284/f3fcd2e4-7948-11e4-8fea-4969e8ec2d7c.png)