Follow-up b3074ad2cc

Change random values of the S and V in HSV colors.
To avoid generation of the extremely light or dark colors we use now generated values from the range [0.65; 0.1]

src/slic3r/GUI/DoubleSlider.hpp

@@ -3,6 +3,7 @@
 
 #include "libslic3r/CustomGCode.hpp"
 #include "wxExtensions.hpp"
+#include "DoubleSlider_Utils.hpp"
 
 #include <wx/window.h>
 #include <wx/control.h>
@@ -118,6 +119,7 @@ class TickCodeInfo
 //    int         m_default_color_idx = 0;
 
     std::vector<std::string>* m_colors {nullptr};
+    ColorGenerator color_generator;
 
     std::string get_color_for_tick(TickCode tick, Type type, const int extruder);