message: give app text some contrast to make it easier to read
diff: @@ -384,7 +384,7 @@ namespace ospray {
  ImGui::End();
  } else {
  ImFont* font = ImGui::GetFont();
  - ImGui::PushStyleColor(ImGuiCol_Text, ImVec4(.9,.9,.9,1.f));
  + ImGui::PushStyleColor(ImGuiCol_Text, ImVec4(1.,1.,1.,1.f));
  ImGui::SetWindowFontScale(currentWidget->fontScale*1.0f);
  font->Scale = 6.f;
  ImGui::Text("%s", ("OSPRay v" + std::string(OSPRAY_VERSION)).c_str());
  @@ -394,7 +394,7 @@ namespace ospray {
  std::stringstream ss;
  ss << 1.f/currentWidget->renderTime;
  - ImGui::PushStyleColor(ImGuiCol_Text, ImVec4(.5,.5,.5,1.f));
  + ImGui::PushStyleColor(ImGuiCol_Text, ImVec4(.2f, .2f, 1.f, 1.f));
  ImGui::Text("%s", ("fps: " + ss.str()).c_str());
  ImGui::Text("press \'g\' for menu");
  ImGui::PopStyleColor(1);
  