QTextHTMLParser hardcodes Courier for <pre></pre> blocks

QVector<QCss::Declaration> standardDeclarationForNode(const QTextHtmlParserNode &node) contains hardcoded requests for Courier New and courier in its treatment of Html_pre nodes. This gives rather surprising results in environments where the default or configured fixed-width font is visually very different from Courier (= almost all modern environments).

Is there any reason why the correct monospace font isn't looked up and used instead?