fixes #2140 PHP 8 issues

include/block.class.php

@@ -263,6 +263,8 @@ class DisplayBlock
   /** @var string */
   public $raw_content;
 
+  public $id;
+
   /**
    * @param RegisteredBlock $block
    */

themes/default/template/menubar_menu.tpl

@@ -11,7 +11,7 @@
 	<ul>{strip}
 	{foreach from=$block->data item=link}
 		{if is_array($link)}
-			<li><a href="{$link.URL}" title="{$link.TITLE}"{if isset($link.REL)} {$link.REL}{/if}>{$link.NAME}</a>{if isset($link.COUNTER)} ({$link.COUNTER}){/if}</li>
+			<li><a href="{$link.URL}"{if isset($link.TITLE)} title="{$link.TITLE}"{/if}{if isset($link.REL)} {$link.REL}{/if}>{$link.NAME}</a>{if isset($link.COUNTER)} ({$link.COUNTER}){/if}</li>
 		{/if}
 	{/foreach}
 	{/strip}</ul>