Remove chosen gem

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Replace chosen with select2

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Select2 dropdown autoWidth

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Remove chosen from tests

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Remove include of un-existing helper

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Include missing helper for project_forked_merge_requests tests

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge branch 'select2' of /home/git/repositories/gitlab/gitlabhq