ID 363347 - Update Nodal Shading to define expectations in relation to the advanced viewport.

Problem summary
Update Nodal Shading to define expectations in relation to the advanced viewport.

Customer reported version
modo.12.1v2

Customer reported platform
windows10

Reproduced by support
Modo Nodal Shading documentation: https://learn.foundry.com/modo/content/help/pages/shading_lighting/shader_items/nodal_shading.html

Expected behaviour
Nodal shading documentation should define viewport interactivity.

Actual behaviour
Nodal shading documentation does not mention viewport interactivity.