Use full group name for admin group index and show pages

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

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

@@ -20,7 +20,7 @@
     = image_tag group_icon(group), class: "avatar s40 hidden-xs"
   .title
     = link_to [:admin, group], class: 'group-name' do
-      = group.name
+      = group.full_name
   - if group.description.present?
     .description

app/views/admin/groups/show.html.haml

 - page_title @group.name, "Groups"
 %h3.page-title
-  Group: #{@group.name}
+  Group: #{@group.full_name}
   = link_to edit_admin_group_path(@group), class: "btn pull-right" do
     %i.fa.fa-pencil-square-o