Show full path for nested groups at dashboard groups list

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

app/models/namespace.rb

@@ -162,6 +162,14 @@ class Namespace < ActiveRecord::Base
     end
   end
+  def full_name
+    if parent
+      parent.full_name + ' / ' + name
+    else
+      name
+    end
+  end
+
   private
   def repository_storage_paths

app/views/shared/groups/_group.html.haml

@@ -28,7 +28,7 @@
     = image_tag group_icon(group), class: "avatar s40 hidden-xs"
   .title
     = link_to group, class: 'group-name' do
-      = group.name
+      = group.full_name
     - if group_member
       as