Fixes editor style bar background color for iOS 7.1 and later.

Fixes #1369 
Before: 
![ios simulator screen shot mar 18 2014 2 29 59 pm](https://f.cloud.github.com/assets/1435271/2452661/2183b1e6-aed4-11e3-8573-dc69c89211af.png)


After:
![ios simulator screen shot mar 18 2014 2 31 57 pm](https://f.cloud.github.com/assets/1435271/2452663/260b9e22-aed4-11e3-8cae-7d0f7048e3d5.png)