Add sorting for extra fields values

htdocs/core/class/extrafields.class.php

@@ -808,6 +808,8 @@ class ExtraFields
 				$sql.=$sqlwhere;
 				//print $sql;
 
+				$sql .= ' ORDER BY ' . implode(', ', $fields_label);
+
 				dol_syslog(get_class($this).'::showInputField type=sellist', LOG_DEBUG);
 				$resql = $this->db->query($sql);
 				if ($resql)