FIxed add-member form styling. fixes #2737

![screenshot from 2014-09-06 21 29 30](https://cloud.githubusercontent.com/assets/3893573/4175634/716e03e0-35df-11e4-9623-735e70aa1ddc.png)
![screenshot from 2014-09-06 21 29 36](https://cloud.githubusercontent.com/assets/3893573/4175635/717076ca-35df-11e4-9e53-b2e3c9a12d8c.png)
![screenshot from 2014-09-06 21 29 46](https://cloud.githubusercontent.com/assets/3893573/4175636/72246d24-35df-11e4-8512-e6c510825d4d.png)