I18N GAP FIXED: Underlines too close to text in Arabic

See https://www.w3.org/TR/alreq-gap/#issue223_text_decoration

All major browser engines now support text-underline-position and text-underline-offset. These can now be used to lower the underline position.

However, there are still things to consider depending on the script, the font in use, and the browser, when setting an underline position.

For details, see the article Styling underlines. https://www.w3.org/International/articles/styling/underline

(Also covers vertical text and other aspects.)