Advanced docker prune support

Would be nice to prune images and containers and possibly even networks.

docker system prune --all would do the trick.

From the documentation: Remove all unused containers, networks, images (both dangling and unreferenced), and optionally, volumes.

Additionally I would love to see a button for docker image prune --all and docker container prune --all to prune just images or just stopped containers.

docker container prune --all could include a popup saying something like:

"All stopped containers will be removed. Please make sure all of your services are running".

Since --volumes could cause dataloss I would not include that into ploi just yet.