Fix text for Passphrase credential destruction transaction when restoring credentials

Summary:
Fixes T10211. This transaction can either be setting or removing the "destroyed" flag, but we show "destroyed" in both cases.

Instead, if the transaction is clearing the flag, render "restored".

Test Plan:

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10211

Differential Revision: https://secure.phabricator.com/D15096