Using the test program in RT-40261,
if Alt-space is used when the application has focus, the Minimize option is greyed out and should not be.

The previous fixes addressed aspects of TRANSPARENT + Iconify but it could be that when we are not decorated, that we don't need to disable all of the functions. Note that Maximize is not greyed out and yet I think we tell the WM to not provide that function.

Clearly, a deeper look is in order, but the likely change means it should be in 9.