Fix #7 - improve intitiviness

Now button for search action is bigger with description, and clear button is with close/clear icon.

BEFORE:
![2](https://cloud.githubusercontent.com/assets/218911/4119664/af1894d4-32ac-11e4-9043-a80a148120af.jpg)

AFTER

![9](https://cloud.githubusercontent.com/assets/218911/4119685/d510e48e-32ac-11e4-834d-157dfb2acddb.jpg)