Add option for SubsetsForSet selection to track parent set
Add option for SubsetsForSet selection to track parent set

We need a way for this selection to track not the current
set but the parent of the current set. Required for the
FNDE library apps.

Note there may be opportunity to refactor this code with
the other boolean property in this class.

https://phabricator.endlessm.com/T13926

endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib