Set the right default extruder for the main property provider

Fixes CURA-2024

resources/qml/Settings/SettingView.qml

@@ -125,7 +125,7 @@ ScrollView
             {
                 id: provider
 
-                containerStackId: delegate.stackId
+                containerStackId: Cura.MachineManager.activeMachineId
                 key: model.key ? model.key : ""
                 watchedProperties: [ "value", "enabled", "state", "validationState", "settable_per_extruder" ]
                 storeIndex: 0