Support "Commenting" a node. #43
Description
This is an interesting affordance. The only way that comes to mind is that 'commenting' a node disables all dependent nodes as well (unless they accept optional ports).
In the special case of a node with input T and output T, we can allow "skipping" execution, just passing through the value. I'm not sure if this is useful, but this is what Houdini has. However, Houdini benefits because most nodes take Mesh and output Mesh ports. Even then, it's not that useful, imo. Pretty situational.
An alternative would just be to write more nodes that take optional inputs. Right now disconnecting isn't too useful, because most nodes require inputs on their ports. This is just a workflow change.