Fix Cards list in External Accounts

Summary: Minor, sets the list to flush to invoke the correct CSS for the ObjectBox.

Test Plan: Reload Page

Reviewers: epriestley, btrahan

Reviewed By: btrahan

CC: Korvin, epriestley, aran

Differential Revision: https://secure.phabricator.com/D7909

src/applications/settings/panel/PhabricatorSettingsPanelExternalAccounts.php

@@ -36,6 +36,7 @@ final class PhabricatorSettingsPanelExternalAccounts
     $linked = id(new PHUIObjectItemListView())
       ->setUser($viewer)
       ->setCards(true)
+      ->setFlush(true)
       ->setNoDataString(pht('You have no linked accounts.'));
 
     $login_accounts = 0;
@@ -99,6 +100,7 @@ final class PhabricatorSettingsPanelExternalAccounts
     $linkable = id(new PHUIObjectItemListView())
       ->setUser($viewer)
       ->setCards(true)
+      ->setFlush(true)
       ->setNoDataString(
         pht('Your account is linked with all available providers.'));