add ajax tooltip for cronjobs

htdocs/core/lib/functions.lib.php

@@ -11288,6 +11288,9 @@ function getElementProperties($element_type)
 		$classpath = 'comm/action/class';
 		$subelement = 'Actioncomm';
 		$module = 'agenda';
+	} elseif ($element_type == 'cronjob') {
+		$classpath = 'cron/class';
+		$module = 'cron';
 	} elseif ($element_type == 'adherent_type') {
 		$classpath = 'adherents/class';
 		$classfile = 'adherent_type';