Cannot copy and paste cloth config parameters

Copy/pasting cloth configs used to be possible in 4.23. It then got broken in 4.24 (crash) with the introduction of changes required for the new physics engine.

In 4.25, the config evolved to a Map container which doesn't allow the Paste command anymore, preventing the crash, but not solving the lack of copy/paste issue.

1. Load QAGame
2. Open from browser the Skeletal Mesh asset ClothHighFriction.
3. Open from browser the Skeletal Mesh asset ClothHighSolver. 
4. Open first asset's clothing window, right click on the Cloth Configs, choose Copy.
5. Open second asset's clothing window, right click on the Cloth Configs.

Result: The menu entry Paste is disabled.