[FIX] file metadata: maker notes were not being deleted, causing a json_decode error that prevented metadata from showing.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49016 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] file metadata: stray character on last commit.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49017 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] file gallery: don't load full size image for page view thumbnail and use updated rel syntax

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49019 b456876b-0849-0410-b77d-98878d47e9d5