fix #1429: restore context router for FormSidebar, needed by XLS upload
fix #1429: restore context router for FormSidebar, needed by XLS upload

kobotoolbox/kpi,kobotoolbox/kpi,kobotoolbox/kpi,kobotoolbox/kpi,onaio/kpi,kobotoolbox/kpi,onaio/kpi,onaio/kpi,onaio/kpi