[bp/r46567][FIX] tracker field option samerow initializes to true, if the option is not set.
Should read the field definition. Hardcoded for now.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/10.x@46568 b456876b-0849-0410-b77d-98878d47e9d5