Currently the only options for "Order of new terms" in schedules are "In order of lessons" or "Random". The first option's usefulness is limited depending on the types of lessons in the schedule; it's great for things like for prioritizing earlier chapters in textbooks, but not as useful when it comes to studying lessons that are arranged more arbitrarily or schedules that have lots of individually-added terms.
It would be really helpful to have the option to define a custom order for new terms to be introduced in, either by manually arranging the lesson order, or choosing a certain metric to sort all of a schedule's terms by (N-level, reading, stroke count, etc).
