Properly send global settings to the global stack

Contributes to CURA-2006

resources/qml/Settings/SettingView.qml

@@ -94,7 +94,7 @@ ScrollView
             {
                 target: provider
                 property: "containerStackId"
-                when: model.settable_per_extruder || (inheritStackProvider.properties.global_inherits_stack == -1 || inheritStackProvider.properties.global_inherits_stack == null)
+                when: model.settable_per_extruder || (inheritStackProvider.properties.global_inherits_stack != -1 && inheritStackProvider.properties.global_inherits_stack != null)
                 value:
                 {
                     if(inheritStackProvider.properties.global_inherits_stack == -1 || inheritStackProvider.properties.global_inherits_stack == null)