message: show EXR layer options only with float FB
diff: @@ -1262,7 +1262,7 @@ void MainWindow::buildMainMenuFile()
  auto fbFloatFormat = fb["floatFormat"].valueAs<bool>();
  if (ImGui::Checkbox("FB float format ", &fbFloatFormat))
  fb["floatFormat"] = fbFloatFormat;
  - ImGui::Text("(following layers available with FB float format only)");
  + if (fbFloatFormat) {
  ImGui::Checkbox("albedo##screenshotAlbedo", &screenshotAlbedo);
  ImGui::SameLine();
  ImGui::Checkbox("layers as separate files", &screenshotLayers);
  @@ -1271,6 +1271,7 @@ void MainWindow::buildMainMenuFile()
  // implemented only as layers within single file for now
  ImGui::Checkbox("metaData##screenshotMetaData", &screenshotMetaData);
  }
  + }
  ImGui::EndMenu();
  }
  