When adding courses in Timetable Builder, it would be helpful if I would see a "warning/error" note besides sections that I can't enrol in. For Example, if I add ECO101H5 and choose LEC 0201, based on the enrolment controls, I should see a warning if I attempt to add a tutorial that I would be restricted from. For this example, students in LEC 0201 can only enrol in TUT 0201 - TUT 0214.