message: Inline and remove RESOURCES_REQUIRED
  It seems more consistent with other code to just inline these static
  text strings.
diff: @@ -38,7 +38,6 @@ static const Image* FACTORY_IMAGE = nullptr;
  std::array<const Image*, ProductType::PRODUCT_COUNT> PRODUCT_IMAGE_ARRAY;
  static std::string FACTORY_STATUS;
  -static const std::string RESOURCES_REQUIRED = "Resources Required";
  static ProductType SELECTED_PRODUCT_TYPE = ProductType::PRODUCT_NONE;
  @@ -495,9 +494,9 @@ void FactoryReport::drawDetailPane(Renderer& renderer)
  statusPosition.x += FONT_MED_BOLD->width("Status") + 20;
  renderer.drawText(*FONT_MED, FACTORY_STATUS, statusPosition, (isStatusHighlighted ? NAS2D::Color::Red : defaultTextColor));
  - renderer.drawText(*FONT_MED_BOLD, RESOURCES_REQUIRED, startPoint + NAS2D::Vector{138, 60}, defaultTextColor);
  + renderer.drawText(*FONT_MED_BOLD, "Resources Required", startPoint + NAS2D::Vector{138, 60}, defaultTextColor);
  - const auto labelWidth = FONT_MED_BOLD->width(RESOURCES_REQUIRED);
  + const auto labelWidth = FONT_MED_BOLD->width("Resources Required");
  // MINERAL RESOURCES
  const ProductionCost& _pc = productCost(SELECTED_FACTORY->productType());
  