Latest iteration of the systray patch

[Mike Hearn]

This version is resynced against CVS HEAD, and now does a ShowWindow in
the right place (just after the embed notification not in some random WM
message).

This won't be merged so I'm sending it to wine-devel not wine-patches.
Getting it merged is blocking on either somebody giving me example code
for [un]marshaling an HICON into a block of memory or (best fix) images
being moved into the wineserver. This is on Ulrichs todo list but if
anybody wants to beat him to it, go ahead, it's still some time off yet.

thanks -mike