Feature: Visualize networks

[lordvlad]

Docker swarm is pretty weak when it comes to managing networks. It's a hassle to get an idea of how service tasks are connected. I think this would be a perfect place to include a visualization for that information. I don't think it would be wise to include the connection on top of the existing ones, but maybe rather have the option to toggle between using nodes or networks as top-level nodes in the graph. What do you think?