message: moderately sized gui nodes now open by default
diff: @@ -400,13 +400,14 @@ namespace ospray {
  {
  ImGui::Text(text.c_str(),"");
  }
  - if (node->children().size())
  + const int numChildren = node->children().size();
  + if (numChildren > 0)
  {
  text+=node->type();
  text += "##"+((std::ostringstream&)(std::ostringstream("")
  << node.get())).str(); //TODO: use unique uuid for every node
  if (ImGui::TreeNodeEx(text.c_str(),
  - (indent > 0) ? 0 : ImGuiTreeNodeFlags_DefaultOpen)) {
  + (indent > 1 && numChildren > 20) ? 0 : ImGuiTreeNodeFlags_DefaultOpen)) {
  {
  std::string popupName = "Add Node: ##" +
  ((std::ostringstream&)(std::ostringstream("")
  