Segment "Sandbox" in Analysis Workspace

Request: Create a way to create and test new segments before saving, much like how Ad-Hoc operates now.

Currently every time I create or need a temporary segment, I need to save it to use within AW. In Ad Hoc, I can drage the segment to the project window and change, duplicate, add to, or delete, and it does not affect the underlying segment until I choose to save it. In AW, I need to save every version of a segment I am working with, causing my segment ist to expand significantly, and remember to go back to delete all of the ones I no longer need.