some minor design issues

* Fix the layout of the colors
* Wrap long text for clear cache button


Before:

![image](https://cloud.githubusercontent.com/assets/231068/3975071/bb26ae16-2800-11e4-8e50-3540c6bb4ef6.png)

After:

![image](https://cloud.githubusercontent.com/assets/231068/3975077/d11f010a-2800-11e4-84f9-42059d36f45c.png)

And...

The "clean cache" button:

Before:

![image](https://cloud.githubusercontent.com/assets/231068/3975082/f65fb81a-2800-11e4-831d-677a6e23b9f9.png)

After:

![image](https://cloud.githubusercontent.com/assets/231068/3975081/ea6c14ae-2800-11e4-9da2-37fc03a9c4c2.png)

cc @owncloud/designers