Per-site preference for non-Latin characters in anchor ids

Patch to map macrons to latin as a work-around until site preferences for non-Latin characters can be implemented.

I believe currently suggested in the patch implementation is the best way forward - Mozilla suggests using only ASCII characters in the ID attribute value and I'm completely support this recommendation:

Note: Technically, the value for an id attribute may contain any character, except whitespace characters. However, to avoid inadvertent errors, only ASCII letters, digits, '_', and '-' should be used and the value for an id attribute should start with a letter.

Thank you! Released and committed! 🥂

Automatically closed - issue fixed for 2 weeks with no activity.