fix #716: restyle the content edit box for gingerbread devices

fix #716: restyle the content edit box for gingerbread devices
![screen shot 2014-02-06 at 15 33 15](https://f.cloud.github.com/assets/40213/2099748/69f93bc0-8f40-11e3-8402-89a020f1b7ca.png)