ref: master
app/views/shared/_show_thumbnail.html.erb
<%= image_tag(image.public_filename(:thumb)) %>
<%= button_to_function(:photos, _('Change image'), 'display_change_image()', :id => 'change-image-link' ) %>
<% if image.present? && removable %><%= labelled_form_field(_('Remove image'), i.check_box(:remove_image, {}, true, false))%><% end %>