[FIX] filegals: Respect view_file_gallery when listing sub-galleries, corrects visibility of restricted galleries on the filegal explorer for instance (thanks eromneg)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49331 b456876b-0849-0410-b77d-98878d47e9d5