Feature Request - Control to toggle off "Fix Unconnected Channel Output" warning for channels with no output.

[ZestfulFibre]

Pre-Flight checklist

• [x] Did you check to see if this issue already exists?
• [x] This is a single feature request. (Do not put multiple feature requests in one issue)

Describe The Feature Request Below

Currently, it is possible to create a channel that is not connected to any input in the material, however, the interface gives a warning that cannot be toggled off.

There are use cases for channels that don't show in the preview material directly (i.e. color ID mask for a game engine shader that allows you to reassign colors at specific locations, or other mask layers)

A toggle within the channel options would likely be the simplest possible solve for this:

[ucupumar]

That's a good idea! Currently I'm very busy for the next few weeks, feel free if you want to try to implement this by yourself.