tdf#131991 Qt5 RTL mirror mouse wheel X position

Just like all the other events, the mouse wheels X position must
be mirrord in LO RTL mode.

Change-Id: I28e8da0455d941f42f869b08edcdbe570de366c0
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/97338
Tested-by: Jenkins
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>
diff --git a/vcl/qt5/Qt5Widget.cxx b/vcl/qt5/Qt5Widget.cxx
index 1c7a130..0ef305f 100644
--- a/vcl/qt5/Qt5Widget.cxx
+++ b/vcl/qt5/Qt5Widget.cxx
@@ -192,7 +192,9 @@ void Qt5Widget::wheelEvent(QWheelEvent* pEvent)
    const Point aPos = toPoint(pEvent->pos() * m_rFrame.devicePixelRatioF());

    SalWheelMouseEvent aEvent;
    aEvent.mnX = aPos.X();
    aEvent.mnX = QGuiApplication::isLeftToRight()
                     ? aPos.X()
                     : round(width() * m_rFrame.devicePixelRatioF()) - aPos.X();
    aEvent.mnY = aPos.Y();
    aEvent.mnTime = pEvent->timestamp();
    aEvent.mnCode = GetKeyModCode(pEvent->modifiers()) | GetMouseModCode(pEvent->buttons());