explorer systray icon issue & comctl32

We still have issues displaying the systray-icon of
-TightVNC 2.7.10
-Abyss WebServer
-uTorrent 3.4.7
-BitTorrent 7.9.6
-Pidgin 2.10.12

in explorer systray. see react-r70327-systray.webm

Some months ago I created
comctl32-fix-ros.patch
which corrects the issue,
see react-r70327-systray-withComCtl32Patch.webm
but it is just a hackfix.

It does so by changing implementation of ImageList_ReplaceIcon()
for index > maxIndex to show the same behavior as for index == -1
(add the image)

I guess comctl32 is the right place to fix it, but I can not verify easily with XPs comctl32 in ros, as no icons are drawn then at all.

I have been running the hackfix for several months without an issue. We should work on a proper solution for that issue.