[OFFAPPS-105] Add dropdown item to preview article

:computer: 

Add dropdown item to preview article

JIRA: https://zendesk.atlassian.net/browse/OFFAPPS-105

![screen shot 2013-10-04 at 11 31 52](https://f.cloud.github.com/assets/172804/1268485/37d738da-2ce0-11e3-9e05-ff8219b895e9.png)


/cc @maximeprades