message: add node type tag to imgui widgets
  I wish we could have inline color commands to make the type darker, but
  that doesn't exist (yet) without custom solutions
diff: @@ -471,7 +471,7 @@ inline GenerateImGuiWidgets::GenerateImGuiWidgets(TreeState state, bool &u)
  inline bool GenerateImGuiWidgets::operator()(Node &node, TraversalContext &ctx)
  {
  - std::string widgetName = node.name();
  + std::string widgetName = node.name() + " [" + node.subType() + "]";
  // Skip any nodes set to not show in the UI, and don't process children
  if (node.sgNoUI())
  