SelectionProperty::setCertainItem(2) rm optional args

GUI/Model/Descriptor/SelectionProperty.h

@@ -93,10 +93,10 @@ public:
     }
 
     //! Directly set the new item.
-    template <typename S, typename... ArgsForConstructor>
-    S* setCertainItem(ArgsForConstructor... argsForConstructor)
+    template <typename S>
+    S* setCertainItem()
     {
-        auto* s = new S(argsForConstructor...);
+        auto* s = new S();
         if (s != nullptr && m_initializer)
             m_initializer(s, m_p.get());
         m_p.reset(s);