fix(rxActionMenu): Fix arrow positions and demo colours

Closes #544
Closes #543 

Screenshot below shows both the improved arrows as well as the correct colours for "Unorthodox Behaviours"

![screen shot 2014-10-02 at 10 14 05 am](https://cloud.githubusercontent.com/assets/9376/4492130/bcac47cc-4a3e-11e4-8a8e-c42cc9ef39dd.png)