Windows QPA: Fix dock widget drag&drop failure

A previous change to fix QTBUG-85431 has caused this issue by emulating
the behavior of the non-enhanced mouse event handler in a particular
case, where mouse move events that did not change position were ignored.
However, some of these events seem to be involved in the dock drag&drop
implementation. This issue is also reproduced in pre-5.15 releases,
predating the QTBUG-85431 fix, by disabling the enhanced mouse event
handler by setting the QT_QPA_DISABLE_ENHANCED_MOUSE env var. However,
the ignored events in the current issue seem to be non-client events
only, while the QTBUG-85431 issue was related to client mouse events.
So we can restrict the test added in the QTBUG-85431 fix and have both
issues fixed.

Fixes: QTBUG-92182
Change-Id: I98c0c8597912c7f4fe58af375a5a560695a82746
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
(cherry picked from commit 92198efbd2c696470711e7f24c5b6507bb664ce9)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

0 files changed, 0 insertions, 0 deletions