Allow to Decline, Fail & Aborting Tasks

projects
tasks

#1

What about not marking Tasks as Done, but marking them as “failed” or “aborted” or “declined”?
Something like Hiting the “Complete”-Checkmark with “Alt”-Key.
Sometimes I decide not to do a planed task. I don’t want to mark it as done.
Would be great to do this without adding a task for it.