fix for empty search with an archive only field. fix for empty search search title link

git-svn-id: http://svn.montala.net/svn/resourcespace@4510 c08608d7-6e46-0410-86ca-f2a6f1370df5
fff nopreview icons

git-svn-id: http://svn.montala.net/svn/resourcespace@4511 c08608d7-6e46-0410-86ca-f2a6f1370df5
allow get_data_by_field to work with shortnames

git-svn-id: http://svn.montala.net/svn/resourcespace@4512 c08608d7-6e46-0410-86ca-f2a6f1370df5