Enhance the current configuration system to allow setting sides for energy in/out, and assign sides to fluid or gas tanks as we currently can for items.

Have some ideas for this. I'm thinking of a specific interface with 4 different tabs for Items, Fluids, Gases and Energy (in that order), and a button linking to a separate interface that deals with transporter management. Changing the milestone back to v8 as I have nothing better to do.

Making progress on this, just finished the framework. Hopefully the GUI won't be too hard either.

Energy configuration is done! I'll polish off gas/fluid configuration tomorrow. Once again, we will spread this new system across more machines in either a minor (8.1/8.2) or major release.

Just finished the new GUI - it looks pretty nice. Everything is done except the actual implementation itself - I'll go ahead and implement this in all currently configurable machines and we can integrate with more later.

All done! Implemented in all machines that currently implement ISideConfiguration. Once we get dynamic models for the Energy Cube we can implement it there, too; @unpairedbracket, I'll leave the rest up to you. Keep me up to date in #2042.