feature request: automated reminder, independent of run

[selinakreinhard]

Currently, automated reminders are only possible as modules in the run. I'd like formr to have automated reminders that are independent of participant's position in the run.

use case: user wants to remind participants if they did not fill out some surveys within a given time. If participants stop mid-survey (without expiration time), they stay on the survey module forever and will never reach the reminder module. Reminders in run and expiring surveys have the disadvantage that participants will re-start (after being reminded) at the beginning of the survey, which leads to unintended double entries. Manual reminders + overview require users to monitor participant's progress.