Merge pull request #518 from jipe/master

Removed the row wrapper from the catalog show view since it's already defined in the layout template
added ability to use :rows instead of :per_page
Added z-index to CSS-dropdowns.

- Added z-index to CSS-dropdowns so widgets that would be covered by
  the dropdown don't shine through. Value for z-index is using
  bootstrap's zindexDropdown variable.