Is it necessary?

Author: cochcoder

src/slic3r/GUI/GUI_App.cpp

@@ -2559,12 +2559,12 @@ bool GUI_App::on_init_inner()
     //sidebar().aux_list()->init_auxiliary();
     mainframe->m_project->init_auxiliary();
 
-#ifdef __WXGTK3__
-    GtkWidget* gtk_topbar = static_cast<GtkWidget*>(mainframe->topbar()->GetHandle());
-    if (gtk_topbar) {
-        gtk_window_set_titlebar(GTK_WINDOW(mainframe->GetHandle()), gtk_topbar);
-    }
-#endif
+//#ifdef __WXGTK3__
+//    GtkWidget* gtk_topbar = static_cast<GtkWidget*>(mainframe->topbar()->GetHandle());
+//    if (gtk_topbar) {
+//        gtk_window_set_titlebar(GTK_WINDOW(mainframe->GetHandle()), gtk_topbar);
+//    }
+//#endif
 
 // #ifdef __WXGTK3__
 //    gtk_window_set_titlebar(GTK_WINDOW(mainframe), GTK_WIDGET(mainframe->topbar()));