Show build plan name on Harbormaster plan view controller

Summary: Ref T8096.  This shows the build plan name on the Harbormaster build plan view controller.  Without this, the name is not displayed anywhere on the page when you're viewing a build plan's configuration (which makes things confusing if you're updating a bunch of build plans at once).

Test Plan: Viewed a build plan, saw the build plan name on the page.

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: epriestley, Korvin

Projects: #harbormaster

Maniphest Tasks: T8096

Differential Revision: https://secure.phabricator.com/D13356

src/applications/harbormaster/controller/HarbormasterPlanViewController.php

@@ -27,10 +27,10 @@ final class HarbormasterPlanViewController extends HarbormasterPlanController {
       new HarbormasterBuildPlanTransactionQuery());
     $timeline->setShouldTerminate(true);
 
-    $title = pht('Plan %d', $id);
+    $title = $plan->getName();
 
     $header = id(new PHUIHeaderView())
-      ->setHeader($title)
+      ->setHeader($plan->getName())
       ->setUser($viewer)
       ->setPolicyObject($plan);