This property is used in the plugin code, but since it's not defined in the descriptor, there's no way for a user to change it's value via the GUI.
Fixed in git, linux-config branch, rev ea22beacd7b2684c1ac9f77ec1ed9068d04b7efb. I still need to add the fix to the SVN CP branch.
Fixed in Jopr SVN, 2.3.0.GA_CP branch, r1295.
QA Verified, this property now exists in the UI and can be set.
Mass-closure of verified bugs against JON.