LPS-39633 Check staging permissions for DDM actions
LPS-39633 Use DDMPermission instead of DDMDisplay to check add structure permission
LPS-39633 Check staging permissions for DDMStructure and DDMTemplate actions.

Staging permissions for actions over DDMStructures and DDMTemplates depend on which portlet they are being used for. Thus, the portletId parameter is required if staging permissions need to be checked.