Fixed the paging url path in paging controls

The paging url path should be constructed using the action_url that is passed by the controllers to the paging control.

https://bugzilla.redhat.com/show_bug.cgi?id=1171167
#1182
@mzazrivec  ```action_id``` can be non-numeric (for e.g. when its ```new```), but I suppose not in the context of paging, which means we could simplify the method as you suggested.