https://bugs.winehq.org/show_bug.cgi?id=29336
--- Comment #11 from super_man@post.com --- (In reply to Alex Henrie from comment #10)
https://source.winehq.org/git/wine.git/commitdiff/ 9a28e350644b6850f08880a7faa8bce8c41af812 fixed this for if "Emulate a virtual desktop" is checked or "Allow the window manager to decorate the windows" is unchecked in winecfg - thanks Alexandre! winex11.drv will require a separate fix.
The bug 34551 demo installer suffers from this bug too. I installed the game without the patch and the issue is to be seen then I deleted prefix and tried with the patch from http://source.winehq.org/patches/data/120512 and the wine icon isnt visible anymore. Using kde.
I believe your patches fix bug 23203 (dupe?) too, but I cant test that one.