Scheduled Projects - One-time delivery

I'd like to add another option to the Frequency menu that is called "one-time". This would deliver the report on the "starting on" date above and that's it. Right now to do this, you have to redo the Ending On date and scroll back upwards of a year.

My main use case is sending a report at the end of a campaign where I want the "final" report to be delivered, but don't want to be sending it during the time in between.

Related, one annoyance is when I have to scroll back through the year on the calendar. The bottom of the calendar seems fixed, while the top adjusts depending on how many weeks there are in a month. If it goes from 5 lines to 6, I have to move the mouse to scroll to the previous/next month rather than being able to quickly scroll through months.