[WebProfiler] New headlines design

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | no
| License       | MIT
| Doc PR        | no

Before
![before](https://cloud.githubusercontent.com/assets/1835430/5531964/ce047d18-8a31-11e4-9228-b274f541065c.png)

After
![after](https://cloud.githubusercontent.com/assets/1835430/5531967/de8f9b86-8a31-11e4-8a7d-3d811ecc92b8.png)