Fix the info if module are provided by module or not was wrong

htdocs/core/modules/modMailing.class.php

@@ -127,6 +127,10 @@ class modMailing extends DolibarrModules
 		$this->rights[$r][4] = 'mailing_advance';		// Visible if option MAIN_USE_ADVANCED_PERMS is on
 		$this->rights[$r][5] = 'delete';
 
+		// Menus
+		//-------
+		$this->menu = 1;        // This module add menu entries. They are coded into menu manager.
+		
 	}