Improve wording when no reboot is needed

https://github.com/webmin/webmin/issues/2518

status/lang/en

@@ -605,6 +605,7 @@ imap_eport=Missing or non-numeric IMAP server port
 imap_euser=Missing IMAP login
 
 reboot_pkgs=Package updates require a reboot
+reboot_no=No reboot required
 
 phpini_file=PHP-FPM version
 phpini_nofile=PHP-FPM configuration file not found!

status/reboot-monitor.pl

@@ -9,7 +9,8 @@ if (&package_updates::check_reboot_required()) {
 	         'desc' => $text{'reboot_pkgs'} };
 	}
 else {
-	return { 'up' => 1 };
+	return { 'up' => 1,
+		 'desc' => $text{'reboot_no'} };
 	}
 }