Preserve "Space" UI control value when editing Passphrase credentials

Summary: Fixes T9568. We just weren't setting this properly so it would default away from the proper value.

Test Plan:
  - Edited a credential in a non-default space, edit form populated properly.
  - Changed "Space", introduced an error, saved form, got error with sticky value for "Space" properly.
  - Saved form with new space value.
  - Created a new credential.

Reviewers: chad

Reviewed By: chad

Subscribers: revi

Maniphest Tasks: T9568

Differential Revision: https://secure.phabricator.com/D14278

src/applications/passphrase/controller/PassphraseCredentialEditController.php

@@ -249,6 +249,7 @@ final class PassphraseCredentialEditController extends PassphraseController {
         id(new AphrontFormPolicyControl())
           ->setName('viewPolicy')
           ->setPolicyObject($credential)
+          ->setSpacePHID($v_space)
           ->setCapability(PhabricatorPolicyCapability::CAN_VIEW)
           ->setPolicies($policies))
       ->appendControl(