Manage old app versions

I have noticed that TrueNAS keeps pieces of old app versions around. So far I know of:

  • /mnt/.ix-apps/app_configs/[APP]/versions
  • Snapshots
  • Docker images

Is there a way in the GUI to clean these old versions automatically? The snapshots and Docker images I guess I could remove in the GUI, but is it safe to do so, or is there a feature that depends on these?