Alter biblio query to allow for publication sorting based on Authored On date for publications types filter.  #1533
Coding standards change and redundent isset removal.  #1533
Merge pull request #1712 from openscholar/1533-publication-sorting

Talked with @cfirth, looks like this is the best solution for right now so we don't introduce a new bug.

Allow Publications to sort by Authored On Date for publication types filter.