discourse/app/assets/javascripts/admin/templates/components/flag-user.hbs

<div class='flag-user'>
  {{#link-to 'adminUser' user.id user.username class='flag-user-avatar'}}
    {{avatar user imageSize="small"}}
  {{/link-to}}
  <div class='flag-user-details'>
    <div class='flag-user-who'>
      {{#link-to 'adminUser' user.id user.username class="flag-user-username"}}
        {{user.username}}
      {{/link-to}}
      <div class='flag-user-date' title='{{raw-date date}}'>
        {{format-age date}}
      </div>
    </div>
    <div class='flag-user-extra'>
      {{yield}}
    </div>
  </div>
</div>