Search Design fixes

Closes #14800 

- Use colors according to design
- Fix width of search input


![Screen_Shot_2016-04-05_at_11.12.33_AM](/uploads/83681ccd90a1a1542c056fd6dbc974d0/Screen_Shot_2016-04-05_at_11.12.33_AM.png)

![Screen_Shot_2016-04-05_at_11.11.54_AM](/uploads/f7557bea2ae055f3550b89751fd7d371/Screen_Shot_2016-04-05_at_11.11.54_AM.png)

See merge request !3475