mail/src/tpl/account.html

<div class="lightbox-body" ng-controller="AccountCtrl">
  <header>
    <h2>Account</h2>
    <button class="close" ng-click="closeAccount()" data-action="lightbox-close">&#xe007;</button>
  </header>

  <div class="content">
    <button ng-click="exportKeyFile()" class="btn">Export keypair</button>
  </div>
</div>