Clear refresh interval for notes. Fixes duplicate note rendering

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Update votes ferom comments dynamically

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
add 6.4.3 to CHANGELOG

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