Core: Add App::PropertyXLinkSubHidden

src/App/Application.cpp

@@ -1987,6 +1987,7 @@ void Application::initTypes()
     App::PropertyLinkSubListHidden  ::init();
     App::PropertyXLink              ::init();
     App::PropertyXLinkSub           ::init();
+    App::PropertyXLinkSubHidden     ::init();
     App::PropertyXLinkSubList       ::init();
     App::PropertyXLinkList          ::init();
     App::PropertyXLinkContainer     ::init();

src/App/PropertyLinks.cpp

@@ -4074,6 +4074,7 @@ void PropertyXLink::setAllowPartial(bool enable) {
 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 
 TYPESYSTEM_SOURCE(App::PropertyXLinkSub , App::PropertyXLink)
+TYPESYSTEM_SOURCE(App::PropertyXLinkSubHidden, App::PropertyXLinkSub)
 
 PropertyXLinkSub::PropertyXLinkSub(bool allowPartial, PropertyLinkBase *parent)
     :PropertyXLink(allowPartial,parent)

src/App/PropertyLinks.h

@@ -1198,6 +1198,14 @@ public:
     { return "Gui::PropertyEditor::PropertyLinkItem"; }
 };
 
+/** The general Link Property that are hidden from dependency checking
+ */
+class AppExport PropertyXLinkSubHidden : public PropertyXLinkSub
+{
+    TYPESYSTEM_HEADER();
+public:
+    PropertyXLinkSubHidden() { _pcScope = LinkScope::Hidden; }
+};
 
 /** Link to one or more (sub)object(s) of one or more object(s) from the same or different document
  */