Improve search page UX

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

app/views/search/_project_results.html.haml

-%ul.nav.nav-pills.append-bottom-20
+%ul.nav.nav-tabs.append-bottom-10
   %li{class: ("active" if params[:search_code].present?)}
     = link_to search_path(params.merge(search_code: true)) do
       Repository Code
   %li{class: ("active" if params[:search_code].blank?)}
     = link_to search_path(params.merge(search_code: nil)) do
-      Everything else
+      Issues and Merge requests
 
 .search_results
   - if params[:search_code].present?

app/views/search/_results.html.haml

-%fieldset
-  %legend
-    Search results
-    %span.cgray (#{@search_results[:total_results]})
+%h4
+  #{@search_results[:total_results]} results found
+  - if @project
+    for #{link_to @project.name_with_namespace, @project}
+  - elsif @group
+    for #{link_to @group.name, @group}
+
+%hr
 
 - if @project
   = render "project_results"