Update Material Height Blend with Mask Output

Hello,

I have a small suggestion to make for material height blend node.

I would like the Mask output to be exposed as an additional output on the Material Height Blend.

Often times after blending two materials together, I would like to use the mask to do some additional adjustments, for example to alter the normals, to be used to create additional masks.

It is technically something I can do by myself but I would just like for this change to be made on the Substance team side so we don't have a duplicate material height blend node with this additional feature.

It should be a really quick change and shouldn't have any impact on the node's performance.

Thank you!