This is so easily scriptable, it actually seems a waste to have it as a feature, considering the fact that most people probably wouldn't use it.
Code:
menu * {
Relay Window : set %relay.window $$?="Window Name" | set %relay.window $iif($left(%relay.window,1) != $chr(64),@) $+   %relay.window | .window %relay.window
}
on *:text:*:*:{
  if %relay.window {
    .aline %relay.window $1-
  }
}