SLA gizmo - combo replaced by slider, autogeneration uses config value for head_diameter

src/libslic3r/SLA/SLAAutoSupports.hpp

@@ -17,6 +17,7 @@ public:
     struct Config {
             float density_relative;
             float minimal_distance;
+            float head_diameter;
             ///////////////
             inline float support_force() const { return 10.f / density_relative; } // a force one point can support       (arbitrary force unit)
             inline float tear_pressure() const { return 1.f; }  // pressure that the display exerts    (the force unit per mm2)