/**
  * Draw a confirmation message for this action.
  * @param FORM_RENDERER $renderer
  * @access private
  */
 protected function _draw_message($renderer)
 {
     if ($this->copy) {
         $renderer->draw_text_row('', 'Are you sure you want to copy ' . $this->object_list->description() . '?');
     } else {
         $renderer->draw_text_row('', 'Are you sure you want to move ' . $this->object_list->description() . '?');
     }
     if ($this->object_list->has_folders() && $this->visible('maintain_permissions')) {
         $renderer->start_row();
         echo $renderer->check_box_as_html('maintain_permissions');
         $renderer->finish_row();
     }
     if ($this->object_list->has_entries() && $this->visible('copy_as_draft')) {
         $renderer->start_row();
         echo $renderer->check_box_as_html('copy_as_draft');
         $renderer->finish_row();
     }
     /* Make a copy (not a reference). */
     $tree = $this->app->make_tree_renderer();
     include_once 'webcore/gui/folder_tree_node_info.php';
     $tree_node_info = new EXPLORER_FOLDER_TREE_NODE_INFO($this->context);
     $tree_node_info->set_visible_node($this->_folder);
     $tree_node_info->set_selected_node($this->_folder);
     $tree_node_info->nodes_are_links = false;
     include_once 'webcore/gui/selector_tree_decorator.php';
     $decorator = new SELECTOR_TREE_DECORATOR($tree);
     $decorator->control_name = 'selected_folder_id';
     $tree->node_info = $tree_node_info;
     $tree->decorator = $decorator;
     $folder_query = $this->app->login->folder_query();
     $folders = $folder_query->tree();
     $renderer->start_row('Target');
     $tree->display($folders);
     $renderer->finish_row();
     $renderer->draw_error_row('selected_folder_id');
     $buttons[] = $renderer->button_as_HTML('No', "view_explorer.php?id={$this->_folder->id}");
     $buttons[] = $renderer->submit_button_as_HTML();
     $renderer->draw_buttons_in_row($buttons);
 }
   $renderer->set_size(Menu_size_standard);
   $renderer->display($commands);
   ?>
   </div>
 </div>
 <div class="main-box">
   <?php 
   if ($show_tree) {
       ?>
       <div class="columns">
       <div class="left-sidebar tree-content">
         <?php 
       /* Make a copy (not a reference). */
       $tree = $App->make_tree_renderer();
       include_once 'webcore/gui/folder_tree_node_info.php';
       $tree_node_info = new EXPLORER_FOLDER_TREE_NODE_INFO($App);
       $tree_node_info->page_link = 'view_explorer.php';
       $tree_node_info->set_visible_node($folder);
       $tree_node_info->set_selected_node($folder);
       $tree->node_info = $tree_node_info;
       /** @var FOLDER[] $folders */
       $folders = $folder_query->tree();
       $tree->display($folders);
       ?>
       </div>
       <div>
   <?php 
   }
   ?>
         <div class="form-content">
           <form id="<?php