message: don't allow collapse of rendering settings panel
diff: @@ -34,12 +34,12 @@ namespace ospray {
  // TODO: categorize/organize these controls
  // TODO: format these like the "properties editor" found in ImGui_demo.cpp
  -
  - if (ImGui::Begin(
  - "Renderer Settings", nullptr, ImGuiWindowFlags_AlwaysAutoResize)) {
  + auto flags = g_defaultWindowFlags | ImGuiWindowFlags_AlwaysAutoResize;
  + if (ImGui::Begin("Renderer Settings", nullptr, flags)) {
  guiSGSingleNode("aoDistance", renderer["aoDistance"]);
  guiSGSingleNode("aoSamples", renderer["aoSamples"]);
  - guiSGSingleNode("aoTransparencyEnabled", renderer["aoTransparencyEnabled"]);
  + guiSGSingleNode("aoTransparencyEnabled",
  + renderer["aoTransparencyEnabled"]);
  guiSGSingleNode("bgColor", renderer["bgColor"]);
  