Editor only actors stripping actors from cooking

Editor Only Actors & Stripping actors from Cooking:

https://udn.unrealengine.com/questions/258782/editor-only-actors-1.html

https://udn.unrealengine.com/questions/303495/editor-only-object-referenced-by-editor-only-objec.html

https://udn.unrealengine.com/questions/354858/editor-using-cooked-data.html

https://udn.unrealengine.com/questions/173080/actor-visualisation-in-editor-only.html

https://udn.unrealengine.com/questions/7035/editor-only-objects.html