add debug GUI render mode (F8)

src/logic/scripting/lua/libs/libgui.cpp

@@ -96,7 +96,7 @@ static int l_node_destruct(lua::State* L) {
     engine->getGUI()->postRunnable([node]() {
         auto parent = node->getParent();
         if (auto container = dynamic_cast<Container*>(parent)) {
-            container->remove(node);
+            container->remove(node.get());
         }
     });
     return 0;