Unix: Correctly update options pane for PDF printer
Update printer and m_currentPrintDevice before calling QPrintDialogPrivate::selectPrinter() to show values for PDF printer instead of the previously selected printer.
Pick-to: 6.3 6.2 5.15 Change-Id: Iacc34ca4460ec4de0b4b373cd875628733df01bd Reviewed-by: Albert Astals Cid albert.astals.cid@kdab.com (cherry picked from commit e494b39b)