Problem

Project managers need to see the deadlines of their tasks (CAREFUL: Do NOT mix these up with job deadlines. This is about task deadlines).

Solution

Show the task deadline, when available, in the task grid in a new column "Task deadline" in the task overwview.

New column should be sortable anf filterable. It should be hidden by default, but of course stateful. So if project managers show them, for them it should always be visible until they hide it again.