Show GitLab API version on Admin#dashboard

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Remove duplicate items from search autocomplete

Old behaviour gave you duplicate entries if your project is public

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Set noreply@HOSTNAME for reply_to field in all emails

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge branch 'feature/no_reply' of /home/git/repositories/gitlab/gitlabhq
Merge branch 'bug/duplicates_in_search' of /home/git/repositories/gitlab/gitlabhq
Merge branch 'feature/api_version_admin' of /home/git/repositories/gitlab/gitlabhq