fix #797

app/controllers/privacy.php

lib/classes/Privacy.php

lib/models/Courseware/Block.php

lib/models/Courseware/BlockComment.php

lib/models/Courseware/BlockFeedback.php

lib/models/Courseware/Bookmark.php

lib/models/Courseware/Container.php

lib/models/Courseware/StructuralElement.php

lib/models/Courseware/StructuralElementComment.php

lib/models/Courseware/StructuralElementFeedback.php

lib/models/Courseware/TaskFeedback.php

lib/models/Courseware/TaskGroup.php

lib/models/Courseware/Unit.php

lib/models/Courseware/UserDataField.php

lib/models/Courseware/UserProgress.php

lib/modules/CoursewareModule.class.php