window-props: use XResQueryClientIds to get pid
_NET_WM_PID is unreliable! It can be faked or pid might be from different namespace. Ignore _NET_WM_PID and use XResQueryClientIds to get pid.
_NET_WM_PID is unreliable! It can be faked or pid might be from different namespace. Ignore _NET_WM_PID and use XResQueryClientIds to get pid.