QToolButton: adjust menu indicator in RTL-mode

The menu indicator was not adjusted in RTL-Mode to be on the left side
of the text. Use visualRect() to adjust the rectangle before drawing
the PE_IndicatorArrowDown.

Task-number: QTBUG-50084
Change-Id: I20129499f111d06637c98ede23b4635a3fc34a6c
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>

src/widgets/styles/qcommonstyle.cpp

@@ -3411,6 +3411,7 @@ void QCommonStyle::drawComplexControl(ComplexControl cc, const QStyleOptionCompl
                 QRect ir = toolbutton->rect;
                 QStyleOptionToolButton newBtn = *toolbutton;
                 newBtn.rect = QRect(ir.right() + 5 - mbi, ir.y() + ir.height() - mbi + 4, mbi - 6, mbi - 6);
+                newBtn.rect = visualRect(toolbutton->direction, button, newBtn.rect);
                 proxy()->drawPrimitive(PE_IndicatorArrowDown, &newBtn, p, widget);
             }
         }