Please add !

Hi, I have a suggestion that I think other players would like to be added and not just me. I am building a house and at first i wanted it to be one story so i made it one story with a roof. However, i changed it to 2 stories, but i havent deleted the first story roof because it deletes the WHOLE roof plus details and decals that are connected to it! It may seem like a small issue, but it is frustrating because there are many small details added onto the first story roof which took a lot of time and I dont want to delete the WHOLE roof, just parts of the roof. I searched for a solution and found other users (on reddit) have this issue/want to be able to delete parts of the roof and not the whole thing. i really hope this suggestion helps! thanks!!