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: {F1068142}

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10211

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

src/applications/passphrase/storage/PassphraseCredentialTransaction.php

@@ -26,6 +26,7 @@ final class PassphraseCredentialTransaction
 
   public function shouldHide() {
     $old = $this->getOldValue();
+    $new = $this->getNewValue();
     switch ($this->getTransactionType()) {
       case self::TYPE_DESCRIPTION:
         return ($old === null);
@@ -35,6 +36,12 @@ final class PassphraseCredentialTransaction
         return !strlen($old);
       case self::TYPE_LOOKEDATSECRET:
         return false;
+      case self::TYPE_DESTROY:
+        // Don't show "undestroy" transactions because they're a bit confusing
+        // and redundant with restoring a secret.
+        if (!$new) {
+          return true;
+        }
     }
     return parent::shouldHide();
   }
@@ -77,12 +84,18 @@ final class PassphraseCredentialTransaction
         }
         break;
       case self::TYPE_SECRET_ID:
-        return pht(
-          '%s updated the secret for this credential.',
-          $this->renderHandleLink($author_phid));
+        if ($old === null) {
+          return pht(
+            '%s attached a new secret to this credential.',
+            $this->renderHandleLink($author_phid));
+        } else {
+          return pht(
+            '%s updated the secret for this credential.',
+            $this->renderHandleLink($author_phid));
+        }
       case self::TYPE_DESTROY:
         return pht(
-          '%s destroyed this credential.',
+          '%s destroyed the secret for this credential.',
           $this->renderHandleLink($author_phid));
       case self::TYPE_LOOKEDATSECRET:
         return pht(