Here you can supply an Excel file with details of multiple packages and import these into ${g.site_title}.
${c.message}
${h.form(h.url_for(controller='importer', action='preview'), multipart=True, id='import')}
${h.file(name='file', **enable_preview)}
${h.submit('preview', _('Preview'), **enable_preview)}
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${h.end_form()}