app/views/forms/_edit.html.slim
= form_tag sort_form_form_elements_path(form), remote: true, id: 'sort-collection-elements', style: 'hidden: true' do
= hidden_field_tag 'form_element_ids'
ul.list-group.sortable
- form.form_elements.each do |element|
= render partial: 'form_elements/element', locals: { form: form, element: element }