{{left_sidebar_enabled=True}}
{{extend 'layout.html'}}
{{=content}}

{{block left_sidebar}}
{{try:}}{{=back}}{{except:}}{{pass}}{{pass}}
{{try:}}{{=menu}}{{except:}}{{pass}}{{pass}}
{{end}}

{{block header}}
{{try:}}{{=header_tools}}{{except:}}{{pass}}{{pass}}
{{end}}