tdf#80467: Fix math rendering in elements dock with RTL UI

Make sure to disable RTL on the OutputDevice, otherwise the math will be
rendered right-to-left without even mirroring the parenthesis.

Change-Id: Iea43dbc0d7efe914120d5cc1605522254344b4fc
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/155538
Tested-by: Jenkins
Reviewed-by: خالد حسني <khaled@libreoffice.org>

starmath/source/ElementsDockingWindow.cxx

@@ -532,6 +532,7 @@ void SmElementsControl::addElement(const OUString& aElementVisual, const OUStrin
     pDevice->SetDrawMode(DrawModeFlags::Default);
     pDevice->SetLayoutMode(vcl::text::ComplexTextLayoutFlags::Default);
     pDevice->SetDigitLanguage(LANGUAGE_ENGLISH);
+    pDevice->EnableRTL(false);
 
     pDevice->SetBackground(GetControlBackground());
     pDevice->SetTextColor(GetTextColor());