Fix so Sender: address is added to Cc: field on reply to all (#1489011)

CHANGELOG

@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Fix so Sender: address is added to Cc: field on reply to all (#1489011)
 - Fix so addressbook_search_mode works also for group search (#1489079)
 - Fix removal of a contact from a group in LDAP addressbook (#1489081)
 - Inlcude SQL query in the log on SQL error (#1489064)

program/steps/mail/compose.inc

@@ -318,6 +318,8 @@ foreach ($parts as $header) {
         $fvalue .= $v;
       if ($v = $MESSAGE->headers->cc)
         $fvalue .= (!empty($fvalue) ? $separator : '') . $v;
+      if ($v = $MESSAGE->headers->get('Sender', false))
+        $fvalue .= (!empty($fvalue) ? $separator : '') . $v;
     }
   }
   else if (in_array($compose_mode, array(RCUBE_COMPOSE_DRAFT, RCUBE_COMPOSE_EDIT))) {