Hello! I have another feature request! It would be awesome and help me stay much more organized if the editor had the option to make Scene Outliner only show Actors/Objects from the Currently Selected Level. I’ve looked for the option but couldn’t find it. It gets hard to keep track of everything when developing an open world game where you go from towns to mountains, haha. Thanks! 
Isn’t there a function like this already in the bottom right corner of the scene outliner? You can hide objects that are no in the current scene and hide objects that were spawned at runtime.