user32: MENU_TrackMenu, called from TrackPopupMenu(), should send WM_ENTERIDLE message with the menu window handle as lparam with test.

[Rein Klazes]

Hi,

This is an attempt to fix one of the problems that the application in
bug #9615 has, crashing on a NULL window handle passed in a
WM_ENTERIDLE message after pressing a button on the main menu bar.

Turns out that this happens by a wine-internal flag TPM_ENTERIDLEEX that
is not set only if called from TrackPopupMenu(Ex) functions. As the 
conformance
test shows, this is not happening on windows (tested on win95, win2k and 
winXP).

(With the fix, the flag has lost its meaning an can go altogether.)

Rein.

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