ui dropdown does not hide when click others dropdown icon of the right

First: click the icon open the menu.
![image](https://cloud.githubusercontent.com/assets/8816203/15061941/9cd1769e-136d-11e6-85a3-f426cd62cdd1.png)

Second: click the icon open the menu of other one dropdown.
![image](https://cloud.githubusercontent.com/assets/8816203/15061945/ac17a358-136d-11e6-946e-66ddc1597a8a.png)
## Now, you can see two dropdowns's menu are opening.
