Fix show/hide discussion link

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Remove unnecessary sign *

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Allow people to remove source branch of fork project in MR

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