I would like an archive tag function

I've been using sandy as a GTD project manager and labeling each task, note etc.. with the tag for that project. So when I open the window I click the project tag and all my stuff to do and info needed is there. This works great for me, but I just finished the project and wanted to archive the tag like the rest of the tasks and things, so if needed I can find all the tasks later on but don't have to forever look at the tag itself in my list. Just a silly thing really but with it still there it doesn't feel like I finished.