Duplicate comment check should ignore comments in trash

[scribu]

Say you reply to a comment from the admin and then realise that you haven't replied to the right one.

You then send it to trash and attempt to post it again. But you can't, not until you permanently delete the last one.

So that's why I think comments in trash shouldn't be considered when checking for duplicate comments.

[mrmist]

+1, although for a complete solution you should consider that trashed comments can be reinstated, and if someone tried to reinstate a trashed comment that would then be a duplicate maybe some warning should appear?

[azaozz]

(In [12254]) Ignore trashed comments for duplicate comment check, props scribu, fixes #10944