How to hide a face (moving not still)

[kagsundaram]

@kagsundaram

It would be extremely useful to have the same graphic UI for Mask:SimpleShape as is provided for Size,Position,Rotate.

I find I am not the only one who wants this.

@pbattersby

Would it be difficult to add the same handles to the Mask: Simple Shape that are available in the preview window for the Size Position and Rotate filter?