fix(timepicker): fix look with bootstrap3

https://github.com/angular-ui/bootstrap/issues/1285

Changed back to the original design and update it to work with BS3. Also, add fixed width to the inputs to maintain look on wide spaces.

-Pedro
![screenshot from 2013-11-24 20 16 57](https://f.cloud.github.com/assets/976310/1610016/03bd9bd4-5567-11e3-8bef-2c53777645f4.png)