Make it clear that title and categories are optional

mod/editlayout.php

@@ -156,10 +156,10 @@ function editlayout_content(&$a) {
 		'$public'              => t('Public post'),
 		'$jotnets'             => $jotnets,
 		'$title'               => htmlspecialchars($itm[0]['title'],ENT_COMPAT,'UTF-8'),
-		'$placeholdertitle'    => t('Set title'),
+		'$placeholdertitle'    => t('Title (optional)'),
 		'$pagetitle'           => $layout_title,
 		'$category'            => '',
-		'$placeholdercategory' => t('Categories (comma-separated list)'),
+		'$placeholdercategory' => t('Categories (optional, comma-separated list)'),
 		'$emtitle'             => t('Example: bob@example.com, mary@example.com'),
 		'$lockstate'           => $lockstate,
 		'$acl'                 => '',