src/App/dtml/manage_page_header.dtml

<!doctype html>
<html lang="en">
<head>
<dtml-unless management_page_charset>
  <dtml-call "REQUEST.set('management_page_charset','utf-8')">
</dtml-unless>
<meta http-equiv="content-type" content="text/html;charset=&dtml-management_page_charset;" />
<dtml-call "RESPONSE and RESPONSE.setHeader('content-type','text/html;charset='+management_page_charset)">
<title><dtml-if title_or_id><dtml-var title_or_id><dtml-else>Zope</dtml-if></title>
</head>
<body>
  <div class="container-fluid">