fixup! FIX: Fix missing FilamentMapMode declaration

src/slic3r/GUI/FilamentGroupPopup.hpp

@@ -1,6 +1,7 @@
 #ifndef FILAMENT_GROUP_HOVER_HPP
 #define FILAMENT_GROUP_HOVER_HPP
 
+#include "libslic3r/PrintConfig.hpp"
 #include "Widgets/PopupWindow.hpp"
 #include "Widgets/Label.hpp"
 
@@ -75,4 +76,4 @@ private:
     Plater* plater_ref{ nullptr };
 };
 }} // namespace Slic3r::GUI
-#endif
+#endif