Requires permission: ReportAdmins

For each entry in the source step, finds the entry in the target step for the same pupil and the same entry name, and fills in its report text and/or its mark-grade values. Only ever fills a blank: anything a teacher has already written in the target is left alone and counted as skipped. Written for the School's interim reports, whose text and grades carry into the end-of-term report for the same subject.