Highlight the currently selected policy in the policy dropdown control thing

Summary: Ref T603. Make this a little easier to use by highlighting the current value.

Test Plan: See screenshot.

Reviewers: chad, btrahan

Reviewed By: chad

CC: chad, aran

Maniphest Tasks: T603

Differential Revision: https://secure.phabricator.com/D7289

src/view/form/control/AphrontFormPolicyControl.php

@@ -120,6 +120,7 @@ final class AphrontFormPolicyControl extends AphrontFormControl {
         'order' => $order,
         'icons' => $icons,
         'labels' => $labels,
+        'value' => $this->getValue(),
       ));
 
     $selected = $flat_options[$this->getValue()];