assembly: trun on 'NoModify' for VisibilityList

assembly.py

@@ -253,7 +253,7 @@ class AsmGroup(AsmBase):
         self.Object.setPropertyStatus('Group',('Hidden','Immutable'))
         # 'PartialTrigger' is just for silencing warning when partial load
         self.Object.setPropertyStatus('VisibilityList',
-                ('Output','PartialTrigger'))
+                ('Output','PartialTrigger','NoModify'))
 
     def attach(self,obj):
         obj.addProperty("App::PropertyLinkList","Group","Base",'')
@@ -2596,8 +2596,6 @@ class AsmElementGroup(AsmGroup):
         obj.cacheChildLabel()
         # 'PartialTrigger' is just for silencing warning when partial load
         self.Object.setPropertyStatus('VisibilityList', 'PartialTrigger')
-        if gui.AsmCmdManager.AutoElementVis:
-            obj.setPropertyStatus('VisibilityList','NoModify')
 
     def getAssembly(self):
         return self.parent

gui.py

@@ -671,8 +671,6 @@ class AsmCmdAutoElementVis(AsmCmdCheckable):
                 if isTypeOf(obj,(AsmConstraint,AsmElementGroup)):
                     if isTypeOf(obj,AsmConstraint):
                         obj.ViewObject.OnTopWhenSelected = 2
-                    obj.setPropertyStatus('VisibilityList',
-                            'NoModify' if checked else '-NoModify')
                 elif isTypeOf(obj,(AsmElementLink,AsmElement)):
                     if checked:
                         obj.Proxy.parent.Object.setElementVisible(