Added separate damping for bending springs.

The bend damping factor was hardcoded to the same value as the stiffness.
Now it has its own factor in the settings and button in hair dynamics.

release/scripts/startup/bl_ui/properties_particle.py

@@ -330,6 +330,7 @@ class PARTICLE_PT_hair_dynamics(ParticleButtonsPanel, Panel):
         sub = col.column(align=True)
         sub.prop(cloth, "spring_damping", text="Spring")
         sub.prop(cloth, "air_damping", text="Air")
+        sub.prop(cloth, "bending_damping", text="Bending")
 
         col.label(text="Quality:")
         col.prop(cloth, "quality", text="Steps", slider=True)