reduce line-height for textareas

## Before

![screenshot from 2014-09-25 16 51 16](https://cloud.githubusercontent.com/assets/3409958/4406571/235330d8-44c4-11e4-859f-20374cc76e76.png)


## After

![screenshot from 2014-09-25 16 50 53](https://cloud.githubusercontent.com/assets/3409958/4406574/2b5a0c7a-44c4-11e4-8648-7880a94f509e.png)