When tasks have been finished I don't want to delete them because they have useful comments in them. I also don't want them cluttering up the user interface so I can't see what's relevant.

So what I currently do is to move them into an Archive project. This takes a while because you can only move them one at a time, or move them into a new group and move the group.

What would be really useful is to be able to select Archive or Move to.. in the same menu that edit and delete appear.