If a publication is 'In Press' use the 'biblio_date' field to store it's expected in press date.
some views already sorted by year/date/created but some were missing the biblio_date sort, make them all the same
Merge branch 'SCHOLAR-3.x' into 6513
Merge pull request #6567 from openscholar/6513

If a publication is 'In Press' use the 'biblio_date' field to store an "Expected In Press" year