schedulred tasks disappear from roles/objectives board

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When a set a date for a task:

  1. I cannot set a no-date on a task
  2. The task disappeear form the boards Backlog by roles and Backlog by objectives. This makes very difficult to create a list of tasks in a role/objective. The Backlog must have an option for to view planned or done tasks, so a complete view can be possible.
App:
Web app