[REQUEST] Save manual UV unwrapping

**Is your feature request related to a problem? Please describe.**
I am trying to do a manual UV unwrapping, but every time after I set things up, when I change the set preview node, the UV unwrapping gets removed/reset.

**Describe the solution you'd like**
Can we save the UV unwrap in a node that we can place right before the Material node?

**Describe alternatives you've considered**
Not sure what other solutions to this are