Ability to remove a component

In NX2 and 3, there is currently no way to remove a component (artifact) from the front end UI. You can remove all associated assets but the folder lingers empty.

While testing NEXUS-8136, I found this potentially will cause confusion with Docker search which will list the image as still present even if all associated assets are deleted. Jeffry Hesse suggested and I agree this calls for a need to delete the component totally (from the UI).

Like deleting an asset, this implementation does not need to be docker specific. I think there's value in doing it for all types.
After talking to Alin Dreghiciu ticketing for evaluation/triage.