Re-queue labelled tasks.

**Describe the solution you'd like**
I have an image set with cars. I've labelled all of my images and I am getting message "No More Tasks Left in Queue". After some time, I've decided to provide new labels to my project. Now I want to label also trucks. I would like to bring back all of my currently labelled images to the queue. However, I don't want to delete current annotations. I just want to have images back in the queue and create a new annotation based on the one that I have already created. That annotation should show in annotation history like usually.

**Describe alternatives you've considered**
You can copy current annotation for each individual image and submit that annotation. The problem with that solution is that we don't have a clear divide between tasks considered as labelled and the ones that needs to be labelled.