Set task reminders to "x minutes/hours/days before start/end"

The task reminders in eM Client function differently to the event reminders in the way they’re specified. I generally want to specify task reminders to be a certain amount of time before the task starts or finishes. eM Client requires an absolute time rather than a relative time, so this can’t be done as conveniently.

I think it would be useful if eM Client provided a mechanism to allow users to specify task reminders’ times relative to their starts or ends.