Cycles: change Scrambling Distance Multiplier to a soft limit

This allows users to type in values larger than 1, for use in conjunction
with automatic scrambling distance.

Contributed by Alaska.

Differential Revision: https://developer.blender.org/D13580

intern/cycles/blender/addon/properties.py

@@ -348,7 +348,7 @@ class CyclesRenderSettings(bpy.types.PropertyGroup):
     scrambling_distance: FloatProperty(
         name="Scrambling Distance",
         default=1.0,
-        min=0.0, max=1.0,
+        min=0.0, soft_max=1.0,
         description="Reduce randomization between pixels to improve GPU rendering performance, at the cost of possible rendering artifacts if set too low. Only works when not using adaptive sampling",
     )
     preview_scrambling_distance: BoolProperty(