app/views/list/_search.html.haml
= form_tag(nil, { method: :get, class: 'form-inline', role: 'search' }) do
= hidden_field_tag :returning, true
= hidden_field_tag :page, 1
.input-group
= search_field_tag :q, params[:q], class: 'form-control'
%span.input-group-append
= submit_tag ti(:"button.search"), class: 'btn btn-outline-secondary'