unify crumbs + lock icons + show lock in breadcrumb

@steved555 @pswadi-zendesk 

as a nice reminder that you locked the stage / have to unlock when you are done

![screen shot 2014-12-12 at 7 02 53 pm](https://cloud.githubusercontent.com/assets/11367/5422308/aba04854-8231-11e4-9e4f-76de92ccff09.png)


### Risks
 - None
Building tags in the helper feels simpler to me and avoid having a small partial with embedded logic.
Extracted the `active` logic, not sure how to extract more 'data' processing, everything else is just tag building ...