I don’t know if this feature is supported by the editor and hidden somewhere , but it would be cool to see a scene tab in the editor .
Sometimes you wish to copy from another scene , to do that you should always back to the assets panel and look for the specific scene and open it , once you open it you loose track of the previous scene and you have to repeat the process which may become unfriendly in really big projects with a lot of scenes .
Happy Coding 
PS : maybe it supports prefabs too 