Problem: Changing the 'signcolumn' may cause flicker, because it uses
the P_RCLR flag for redrawing (Yggdroot)
Solution: Change 'signcolumn' to use P_RWIN instead of P_RCLR, matching
the behavior of 'number' and 'foldcolumn'
(Yasuhiro Matsumoto).
fixes: #19663
closes: #19713
Signed-off-by: Yasuhiro Matsumoto <mattn.jp@gmail.com> Signed-off-by: Christian Brabandt <cb@256bit.org>