Reminders and wait times in days and hours, not 1440 minutes

Every setting that is a length of time now takes a number and a unit. Booking-page reminders are a list you add to - 1 day before, 1 hour before - instead of a comma-separated row of minutes, and buffers, minimum notice and cancel/reschedule notice work the same way. Flow deadlines, approval time-outs, campaign follow-up waits and A/B decision times can be set in days; social comment spacing in hours; slideshow autoplay in seconds. Nothing already saved changes - a reminder stored as 1440 minutes simply opens as 1 day.