insertTree = new SelectionTree("insert_new_node_selection", getTranslator());
insertTree.setFormButtonKey("insertAtSelectedTreepos");
insertTree.addListener(this);
ICourse course = CourseFactory.getCourseEditSession(ores.getResourceableId());
insertModel = new InsertTreeModel(course.getEditorTreeModel());
insertTree.setTreeModel(insertModel);
VelocityContainer insertVC = createVelocityContainer("insertNode");
insertVC.put("selection", insertTree);
if(insertModel.totalNodeCount() > CourseModule.getCourseNodeLimit()){