Fix typo in css class for embedded related items issue.

Fixes #923 

### Before
![8881439-before](https://cloud.githubusercontent.com/assets/96776/4328854/b5839bec-3f8c-11e4-8e0d-e54424aa9f63.png)

### After
![8881439-after](https://cloud.githubusercontent.com/assets/96776/4330230/7407d264-3faa-11e4-96e7-a848d30a87db.png)