Use gtk_list_store_insert_with_values() to set entry at same time item is inserted.

This should ensure that the entry is always valid, removing the need for r74315.
Also simplify DoInsertItems() by using DoInsertItemsInLoop().


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74317 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/listbox.h

@@ -111,6 +111,7 @@ protected:
     virtual int DoInsertItems(const wxArrayStringsAdapter& items,
                               unsigned int pos,
                               void **clientData, wxClientDataType type);
+    virtual int DoInsertOneItem(const wxString& item, unsigned int pos);
 
     virtual void DoSetFirstItem(int n);
     virtual void DoSetItemClientData(unsigned int n, void* clientData);