Consistent top and bottom margins for queries and filters

Before:
![before](http://cl.ly/image/0A3C2A0p033x/Screen%20Shot%202013-10-29%20at%2012.25.45.png)

After:
![after](http://cl.ly/image/0E3Y1X0l032U/Screen%20Shot%202013-10-29%20at%2012.25.09.png)