Page Setup and Print dialog button captions are left-aligned

In the built-in Page Setup dialog (Printers.ShowPageSetupDialog) and Print dialog (Printers.ShowPrintDialog), the OK and Cancel captions are drawn flush-left inside the buttons instead of centred. The effect is most visible on the short OK caption. Button placement is unaffected; only the caption alignment is wrong.

Built-in dialog buttons should centre their captions, matching the Objo Button control, whose TextAlign property defaults to Centre.