make sure if participant is no more eligible for a unattach, he gets unscheduled
fixing the masstag bug as the action in the frontend will send the update_participants_schedules control message
refactor unattach_message into unattached_message + add manager
refactor the unattached message logic from worker to manager
implement post mass_tag and mass_untag rescheduling behavior
fix spelling
Merge branch 'feature/fix_masstag_schedule' into develop