improve number of iterations

CURA-10685

cura/Settings/CuraFormulaFunctions.py

@@ -101,10 +101,10 @@ class CuraFormulaFunctions:
     def getAnyExtruderPositionWithOrDefault(self, filter_key: str,
                                context: Optional["PropertyEvaluationContext"] = None) -> str:
         for extruder in self._getActiveExtruders(context):
-            value = extruder.getRawProperty(filter_key, "value", context=context)
-            if value is None or not value:
-                continue
-            return str(extruder.position)
+            material_container = extruder.material
+            value = material_container.getProperty(filter_key, "value", context)
+            if value is not None:
+                return extruder.position
         return self.getDefaultExtruderPosition()
 
     # Get the resolve value or value for a given key.

resources/definitions/fdmprinter.def.json

@@ -4500,7 +4500,7 @@
                     "type": "extruder",
                     "default_value": "0",
                     "enabled": "(support_enable or support_meshes_present) and extruders_enabled_count > 1",
-                    "value": "int(defaultExtruderPosition())",
+                    "value": "int(anyExtruderNrWithOrDefault('material_is_support_material'))",
                     "settable_per_mesh": false,
                     "settable_per_extruder": false,
                     "children":