Mobile Saved Search improvements [MJ-680]

Makes our saved search forms replicate the wireframes more closely.

Mobile:
![2014-01-27-092545_315x758_scrot](https://f.cloud.github.com/assets/3379265/2009501/1d1bca9a-875f-11e3-9a20-b5035e035727.png)
Desktop:
![2014-01-27-092619_996x482_scrot](https://f.cloud.github.com/assets/3379265/2009502/1e863438-875f-11e3-922e-de88f1c567cb.png)

All tests pass.