Thanks,
no we don't have this. The workaround is to click on the In Model material, switch to the chosen library and then drag the material from the preview bar in the material picker into the library. SU will auto rename the material by appending the next number and you would then have a duplicate (so if the original was named WoodMat then you would now have WoodMat and WoodMat-1).
You can remove the WoodMat and rename WoodMat-1. This however does not clear the material from the HD so you would have to manage manually.