Intermediary recovery (trash can) repository

We need a permanent "trash can" or "deprecated" repository for deleted artifacts. One major complaint is the difficulty of recovering accidentally deleted artifacts. It should be easy to create a repository that holds the binary references of deleted artifacts and then removes these references after a certain amount of time to be cleaned by Garbage Collection. This would provide an "undelete" option for users without having to resort to manual operations with importing backup data or manual re-deployment (without properties, statistics) from individual exported files.