add forward section

app/UI/Client/EmailAccount/Providers/EditAccountDataProvider.php

@@ -113,9 +113,9 @@ class EditAccountDataProvider extends BaseDataProvider
         } else {
             $this->data['quota'] = 0;
         }
-        if ($account['emailForwarding']['mode'] === 'UForwardYes') {
+        if ($account[0]['emailForwarding']['mode'] === 'UForwardYes') {
             $this->data['forward'] = 'on';
-            $this->data['target'] = $account['emailForwarding']['emailAddresses'][0];
+            $this->data['target'] = $account[0]['emailForwarding']['emailAddresses'][0];
         }
         $lang = di('lang');
         $this->availableValues['status'] = [