Improve admin screen layout

Make the labels 100px wider than bootstrap's default, make the labels on the administration screen focus on the field on click.

![jabbr-increased-controlwidth](https://f.cloud.github.com/assets/1271535/779756/d4c26906-e9e9-11e2-8286-872d7dd1a03c.png)

Note that the increased width is present on the user management screens as well.

![jabbr-increased-controlwidth_6e72](https://f.cloud.github.com/assets/1271535/779760/02c3d790-e9ea-11e2-9ae1-c91475008ea5.png)