REGRESSION : Double click on windows' system icon should "close" window, program (similar to ALT+F4)

reactos-livecd-0.4.15-dev-7749-gacb01cf-x86-gcc-lin-dbg
reactos-livecd-0.4.15-dev-7750-gc17a654-x86-gcc-lin-dbg

Guilty commit : https://github.com/reactos/reactos/commit/c17a6542ac329160ce627267babc8c7ec67b1e86 in PR https://github.com/reactos/reactos/pull/6427 by DougLyons while attempting to fix CORE-14436 and CORE-16985 using patch from I_Kill_Bugs 

Double click on windows' system icon should "close" window, program (similar to ALT+F4)

Nothing in log when double click is performed