ref: master
plugins/diagramo/views/content_viewer/diagramo_plugin/_diagram.html.erb
<% if defined? back_to and back_to %>
<% button_bar do %>
<%= button :back, 'Voltar a %{parent}' % {parent: back_to.name}, back_to.url %>
<% end %>
<% end %>
<% if !@page.parent || @page.parent.path.blank? %>
<% end %>