{{/* The design page's preview of the header: a page of its own for the
sandboxed frame — the real blog.css and theme CSS, and the header as the
form would save it. Only "preview" is ever executed; the empty content
block keeps the layout's reference satisfied. */}}
{{define "content"}}{{end}}
{{define "preview"}}
{{t "Preview"}}
{{template "siteheader" .}}
{{end}}