- Switched from jQuery `.attr` to plain javascript `.getAttribute`
- Tested the issue movement between columns, column background color
setting, and column deletion. It all works as before
---------
Signed-off-by: Yarden Shoham <git@yardenshoham.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Giteabot <teabot@gitea.io>
(cherry picked from commit 5c91d7920f4aff08768e274269e211e926aa3d36)