[fp/r52938 from 12.x][FIX] trackers: Fix for trackerfilter when using an ItemLink filter field with labels created from multiple fields. Should address wish5214 (thanks Geoff)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@52963 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] trackerfilter: Let chosen menu filters show in filter form

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@52964 b456876b-0849-0410-b77d-98878d47e9d5