[Cin] IceWM 3.1

from phoronix https://www.phoronix.com/news/IceWM-3.1-Released ++++ IceWM 3.1 introduces a new window option "frame" to automatically group application windows with the same "frame" value as tabs within a single frame. ++++ this behavior *may* workaround 'too many windows' complain from cin users.