DNA - Navigation Bar

_application_bar.html.haml

%nav.navbar.sticky-top.navbar-expand.navbar-light.bg-light.border-bottom-1
  .navbar-brand
    = link_to root_path do
      = image_tag 'dna-logo-col.svg', alt:"dna"
  - if user_signed_in?
    %span.navbar-text.py-0
      = yield :page_heading
    %button.navbar-toggler{type:"button", data:{toggle:"collapse", target:"#navbarTogglerDemo01"}, aria:{controls:"navbarTogglerDemo01", expanded:"false", label:"Toggle navigation"}}
      %span.navbar-toggler-icon
    .collapse.navbar-collapse#navbarTogglerDemo01
      .navbar-nav.ml-auto
        .nav-item.collapse-search
          = form_tag search_results_path, method: :get, id: 'search-form', class: 'form-inline' do
            #search-container.input-group
              = text_field_tag :term, @search_term, id: "search_term_input", class: "form-control", placeholder: "Search for ..."
              %span.input-group-btn
                %button#search_btn.btn.btn-outline-secondary{type:"submit"}
                  %i.fa.fa-search{aria:{hidden:"true"}}
        .nav-item.dropdown
          = link_to '#', html_options = {id:"navbarDropdownMenuLink", class:"nav-link dropdown-toggle",aria:{expanded:"false", haspopup:"true"}, data:{toggle:"dropdown"}} do
            %i.fa.fa-user
            = current_user.email
          .dropdown-menu{aria:{labelledby:'navbarDropdownMenuLink'}}
            = link_to( "Change password", edit_user_registration_path, class:'dropdown-item')
            = link_to( t('logout'), destroy_user_session_path, :method => :delete, class:'dropdown-item')
        .nav-item
          = link_to configuration_path, class: 'nav-link' do
            %i.fa.fa-cogs
        .nav-item.dropdown
          = link_to(url_for(locale: "en"), html_options = { class: 'nav-link', role:'button', 'data-toggle':"dropdown" }) do
            %span.flag-icon.flag-icon-gb