openproject/app/views/mailer/_notification_settings_table.html.erb

<table <%= placeholder_table_styles(style: 'font-size:14px;') %>>
  <tr>
    <td>
      <table <%= placeholder_table_styles(width:'100%',style: 'width:100%;') %>>
        <tr>
          <td>
            <%= yield %>
          </td>
        </tr>
      </table>
    </td>
    <%= placeholder_cell('10px', vertical: true) %>
    <td>
      <%= render partial: 'mailer/notification_settings_button' %>
    </td>
  </tr>
</table>