It's a simple, small idea, but useful I think. We currently have a designated button that takes an element from the Main Model and adds it to a Design Option Set ("Add to Set"). But there's no method of removing an element from a set and putting back in only the Main Model besides deleting it and copy/pasting, which doesn't feel as legitimate as adding it does. It may work for components like furniture, but when it comes to walls and such, you have to verify that the heights are correct and that it's attached to the appropriate elements around it.
Just add another button: "Remove from Set".
