Change "Add Preload Node" action to "Add Node(s)"

The action might also drop Custom Nodes

(cherry picked from commit 70a6ff0a7185264781ae98c2013fd9c994eca48f)

modules/visual_script/visual_script_editor.cpp

@@ -2193,7 +2193,7 @@ void VisualScriptEditor::drop_data_fw(const Point2 &p_point, const Variant &p_da
 		int new_id = script->get_available_id();
 
 		if (files.size()) {
-			undo_redo->create_action(TTR("Add Preload Node"));
+			undo_redo->create_action(TTR("Add Node(s)"));
 
 			for (int i = 0; i < files.size(); i++) {
 				Ref<Resource> res = ResourceLoader::load(files[i]);