Yes, WShow is a no show in IDL 8.x. I guess it's not coming back, because I've been complaining about it for about two years now and no one even seems to know what I'm talking about.
http://www.idlcoyote.com/...ps/noshow_wshow.html
If I were you, I would invest in another monitor for your graphics windows. Or, failing that, I've found on my laptop that Actual Title Buttons from ActiveTools are useful. You can "pin" windows on top, roll them up out of the way, etc. I use these when I am teaching classes. Otherwise, my blood pressure gets so high its gets dangerous.
http://www.actualtools.com/products/
By the way, it's always good for a laugh in a class when I type WShow and the browser pops forward, showing the restaurant where we are going to lunch!