This prevents the tracking menu from erroneously closing itself right after it was opened in some cases.
Fixes CORE-17338 which got unhidden by 0.4.15-dev-1126-g 58b0558f94
And fixes CORE-15760 which got unhidden by SVN r74972 == git 19dd22d422
Since both symptoms look very similar but the unhiding revisions did differ,
that could mean we do have some kind of race condition here.
I guess this fix is more like a workaround.
2 Fixes picked:
0.4.15-dev-3313-g 6417b2323d [NTUSER][USER32] Workaround tracking menu on CORE-17338 CORE-15760 (#4048)
to prevent the menu from auto-closing
and
0.4.15-dev-3297-g 037c744eb1 [EXPLORER] Send WM_POPUPSYSTEMMENU asynchronously CORE-16353 (#4047)
to make the taskbar button turn into pressed state when the menu opens
