CORE-15477 "TileWorld 1.3.2 now leaves the taskbar visible in fullscreen"-regression-test. Desktop resolution for that test 800x600 VBEMP VBox4.3.12

0.4.11-RC-22-g2522ec1    affected, leaves taskbar visible when desktop resolution is 800x600
bootcd-75990-dbg.iso     affected, leaves taskbar visible when desktop resolution is 800x600
bootcd-75675-dbg.iso     affected, leaves taskbar visible when desktop resolution is 800x600
bootcd-75521-dbg.iso     affected, leaves taskbar visible when desktop resolution is 800x600
bootcd-75444-dbg.iso     affected, leaves taskbar visible when desktop resolution is 800x600
bootcd-75409-dbg.iso     affected, leaves taskbar visible when desktop resolution is 800x600
bootcd-75407-dbg.iso     affected, leaves taskbar visible when desktop resolution is 800x600   <- GUILTY 09ab5ea7ed2ab0e709ed2e8f8f9f6c3711b2ac7f [NTUSER] by jimtabor 26. July 2017 "Broadcast the appropriate messages to notify..."
bootcd-75406-dbg.iso     ok, works, does not leave the taskbar visible when desktop resolution is 800x600
bootcd-75404-dbg.iso     ok, works, does not leave the taskbar visible when desktop resolution is 800x600
bootcd-75400-dbg.iso     ok, works, does not leave the taskbar visible when desktop resolution is 800x600
bootcd-75390-dbg.iso     ok, works, does not leave the taskbar visible when desktop resolution is 800x600
bootcd-75374-dbg.iso     ok, works, does not leave the taskbar visible when desktop resolution is 800x600
bootcd-75075-dbg.iso     ok, works, does not leave the taskbar visible when desktop resolution is 800x600
bootcd-75000-dbg.iso     ok, works, does not leave the taskbar visible when desktop resolution is 800x600
bootcd-74429-dbg.iso     ok, works, does not leave the taskbar visible when desktop resolution is 800x600   (I did double-check with this specific build: it works even when desktop resolution was 1024x768)