Dockable Portal Nodes

Hi Substance team!

Really enjoying the new portal node and it's keeping graphs really clean and readable, it also encourages reusing nodes so it keeps the computation time down.

I was wondering if there was a possibility to make portals dockable.
Let's say something like this with a different color to differentiate it from other nodes.

The reason I'm requesting for this is that, while moving things around, portals don't often get picked up when you drag nodes around unless you specifically marquee select them.

It is often times more intuitive to grab the two nodes you want to move and just shift them to where you want them but at the moment, the portals would be left behind. This is also the case when trying to grab a node and holding Shift to expand the frame, but the portal gets left behind.

My colleagues have the same sentiments about this which is why I'm making this request.

It would be really great if something can be improved about this, thank you so much!