[bug] reminder messages have incorrect due date

[colmdoyle]

When we schedule the message for the reminder, we add the current relative time outstanding in the message, not what it will be when the message sends.

[colmdoyle]

I've also just realised that the order is out of whack. On Desktop "Nooooo (that's fine)" appears directly underneath "Task title", but on iOS, it reads "Task title / Due date / Nooooo (that's fine) / in 5 days"