Handle mappings to directive objectiveables special in the controller so
that the mapping is constructed.
Revert changes to modals_controller and make it so that the mapping
dialog is popped up rather than the modal create dialog when selecting
+Objective for a Directive object.
Merge pull request #809 from reciprocity/feature/fix-objective-mapping

62043358 Fix for +Objective tree footer link in Directive objects so that the