Revert "Revert "Fixed duplicate QMoveEvent generated for each QWidget::move call""

This reverts commit c3e416296a.

The idea of detecting non-spontaneous events by comparing
against the widget's crect has problems when sequences
of programmatic resizes occur. In  addition, QWindowSystemInterface's
queueing of events is problematic for this.

Task-number: QTBUG-39611
Task-number: QTBUG-32590
Change-Id: I9ff8049add147be23e064a513e8645ae04577c6c
Reviewed-by: Andy Shaw <andy.shaw@digia.com>

src/widgets/kernel/qwidget_qpa.cpp

@@ -779,7 +779,10 @@ void QWidgetPrivate::setGeometry_sys(int x, int y, int w, int h, bool isMove)
             }
         }
 
-        if (isMove) {
+        // generate a move event for QWidgets without window handles. QWidgets with native
+        // window handles already receive a move event from
+        // QGuiApplicationPrivate::processGeometryChangeEvent.
+        if (isMove && (!q->windowHandle() || q->testAttribute(Qt::WA_DontShowOnScreen))) {
             QMoveEvent e(q->pos(), oldPos);
             QApplication::sendEvent(q, &e);
         }