properly locks profile inspector

Author: StephenHodgson

Assets/MixedRealityToolkit/_Core/Inspectors/Profiles/MixedRealityControllerVisualizationProfileInspector.cs

@@ -1,6 +1,7 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License. See LICENSE in the project root for license information.
 
+using Microsoft.MixedReality.Toolkit.Core.Definitions;
 using Microsoft.MixedReality.Toolkit.Core.Definitions.Devices;
 using Microsoft.MixedReality.Toolkit.Core.Definitions.Utilities;
 using Microsoft.MixedReality.Toolkit.Core.Devices.UnityInput;
@@ -86,6 +87,11 @@ public override void OnInspectorGUI()
             EditorGUILayout.HelpBox("Define all the custom controller visualizations you'd like to use for each controller type when they're rendered in the scene.", MessageType.Info);
             serializedObject.Update();
 
+            if (MixedRealityPreferences.LockProfiles && !((BaseMixedRealityProfile)target).IsCustomProfile)
+            {
+                GUI.enabled = false;
+            }
+
             EditorGUIUtility.labelWidth = 168f;
             EditorGUILayout.PropertyField(renderMotionControllers);