Metrics drawer cleanup

improve alignment of items, also in RTL

before:
![1_dev_](https://cloud.githubusercontent.com/assets/3845150/4606103/ecca667e-520d-11e4-97a8-d4f4321e8e9d.png)

after:
![2_cleanup_](https://cloud.githubusercontent.com/assets/3845150/4606104/f4719050-520d-11e4-8638-f556d0c8ae1b.png)