Refactor UI header for logged out users

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/views/layouts/application.html.haml

@@ -5,11 +5,7 @@
     -# Ideally this would be inside the head, but turbolinks only evaluates page-specific JS in the body.
     = yield :scripts_body_top
 
-    - if current_user
     = render "layouts/header/default", title: header_title
-    - else
-      = render "layouts/header/public", title: header_title
-
     = render 'layouts/page', sidebar: sidebar
 
     = yield :scripts_body

app/views/layouts/header/_default.html.haml

@@ -13,6 +13,7 @@
           %li.visible-sm.visible-xs
             = link_to search_path, title: 'Search', data: {toggle: 'tooltip', placement: 'bottom', container: 'body'} do
               = icon('search')
+          - if current_user
             - if session[:impersonator_id]
               %li.impersonation
                 = link_to stop_impersonation_admin_users_path, method: :delete, title: 'Stop Impersonation', data: { toggle: 'tooltip', placement: 'bottom', container: 'body' } do
@@ -37,6 +38,10 @@
             %li
               = link_to destroy_user_session_path, class: 'logout', method: :delete, title: 'Sign out', data: {toggle: 'tooltip', placement: 'bottom', container: 'body'} do
                 = icon('sign-out')
+          - else
+            .pull-right
+              = link_to "Sign in", new_session_path(:user, redirect_to_referer: 'yes'), class: 'btn btn-sign-in btn-success'
+
 
       %h1.title= title
 

app/views/layouts/header/_public.html.haml

-%header.navbar.navbar-fixed-top.navbar-gitlab{ class: nav_header_class }
-  %div{ class: fluid_layout ? "container-fluid" : "container-fluid" }
-    .header-content
-      - unless current_controller?('sessions')
-        .pull-right
-          = link_to "Sign in", new_session_path(:user, redirect_to_referer: 'yes'), class: 'btn btn-sign-in btn-success'
-
-      .navbar-collapse.collapse
-        %ul.nav.navbar-nav.pull-right
-          - unless @disable_search_panel
-            %li.hidden-sm.hidden-xs
-              = render 'layouts/search'
-          %li.visible-sm.visible-xs
-            = link_to search_path, title: 'Search', data: {toggle: 'tooltip', placement: 'bottom', container: 'body'} do
-              = icon('search')
-
-      %h1.title= title
-
-
-= render 'shared/outdated_browser'