lightbox_preview: Fixed recent changes, added alternative files support.


git-svn-id: http://svn.resourcespace.org/svn/resourcespace@4570 c08608d7-6e46-0410-86ca-f2a6f1370df5
Bug fix for !duplicates search disk space usage bomb error


git-svn-id: http://svn.resourcespace.org/svn/resourcespace@4571 c08608d7-6e46-0410-86ca-f2a6f1370df5
Initial commit
Merge branch 'master' of github.com:rzamana/resourcespace