Force update the provider when the setting's limit_to_extruder gets changed

CURA-4186

In the per-object settings, when a setting's limit_to_extruder gets
changed, its value should be updated too.

plugins/PerObjectSettingsTool/PerObjectSettingsPanel.qml

@@ -156,6 +156,15 @@ Item {
                             watchedProperties: [ "limit_to_extruder" ]
                         }
 
+                        Connections
+                        {
+                            target: inheritStackProvider
+                            onPropertiesChanged:
+                            {
+                                provider.forcePropertiesChanged();
+                            }
+                        }
+
                         Connections
                         {
                             target: UM.ActiveTool