Small .breadcrumbs optimization

With this change, the right padding-attribute of the icon in the breadcrumbs area becomes smaller and the icon will appear central.
Testet with all major browsers (IE with 9 and 10)
![breadcrumbs](https://f.cloud.github.com/assets/1836347/774369/57e27892-e956-11e2-9fba-da9baf7df855.png)