The marketing campaign app was migrated to Odoo's newer application framework, helping keep it compatible and easier to maintain. Existing campaign behavior and reports were reorganized and tests were converted to improve reliability without introducing a new business feature.

Task: https://www.odoo.com/web#id=12168&view_type=form&model=project.task&menu_id=3942&action=327
Pad: https://pad.odoo.com/p/r.gx6zwHpL0iaRYqhv