Add a way to mark tasks as "canceled"
Sometimes a task is added but never completed because it becomes irrelevant, or was an incorrect idea to begin with, etc. Deleting such tasks will leave no record of them; marking them as "completed" would falsify the data. It would be great to be able to mark tasks as "canceled" or "rejected" (or choose yor own, more precise term). In the UI, such tasks should porobably be treated as completed taskls, e.g. when hiding/filtering, etc.
(I use MLO to track planned features and bugs in Delphi software I write. Preserving the "rejected ideas" would be very useful in this context),
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S English commented
I use a context "-superseded", for that. I also have formatting so that items with the "-superseded" context get a little red cross in icon position 0, next to the check box.
Would that work around be any good for you?