Windows: Don't raise inactive windows when showing a tooltip

The Qt4 Q_WS_WIN ifdef never got ported.

Change-Id: Iad1ca1a3e20bd5254895781eee09897520b7d7d1
Task-Id: QTBUG-39147
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

src/widgets/kernel/qtooltip.cpp

@@ -493,12 +493,12 @@ void QToolTip::showText(const QPoint &pos, const QString &text, QWidget *w, cons
     }
 
     if (!text.isEmpty()){ // no tip can be reused, create new tip:
-#if 1 // Used to be excluded in Qt4 for Q_WS_WIN
-        new QTipLabel(text, w, msecDisplayTime); // sets QTipLabel::instance to itself
-#else
+#ifdef Q_OS_WIN32
         // On windows, we can't use the widget as parent otherwise the window will be
         // raised when the tooltip will be shown
         new QTipLabel(text, QApplication::desktop()->screen(QTipLabel::getTipScreen(pos, w)), msecDisplayTime);
+#else
+        new QTipLabel(text, w, msecDisplayTime); // sets QTipLabel::instance to itself
 #endif
         QTipLabel::instance->setTipRect(w, rect);
         QTipLabel::instance->placeTip(pos, w);

tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp

@@ -5716,6 +5716,8 @@ void tst_QWidget::setToolTip()
             QTest::qWait(2200);     // delay is 2000
         QTest::mouseMove(popupWindow);
     }
+
+    QTRY_COMPARE(QApplication::topLevelWidgets().size(), 1);
 }
 
 void tst_QWidget::testWindowIconChangeEventPropagation()