General Info Cache

I have added support for the new partmodule KSPField 'moduleIsEnabled' to some PartModules (RCS, Gimbal, generators, alternators...). You can add a partmodule in disabled state and then use upgrades to enable it. 

edit: @Angel-125 there's a lot of other stuff that EditorPartIcon does than load the model, so best make a dummy part to wrap that model and set it to category = -1 and TechRequired = ORPHANS so it will not appear in game otherwise.