Desktop: fix #3171: add support for matching text with diacritics for GotoAnything

[ylc395]

fix #3171. When matching text for highlighting, use diacritics-removed keywords to match diacritics-removed body.

FYI: I find anohter way to remove diacritics:

function removeDiacritics(str) {
  return str
    .normalize('NFD')
    .replace(/[\u0300-\u036f]/g, '');
}

Should we replace the origin implementation in string-utils.js with this implementation?

[laurent22]

We need a description of what this pull request does. Also please give the issue a meaningful title, according to the template: https://github.com/laurent22/joplin/blob/master/.github/PULL_REQUEST_TEMPLATE

[laurent22]

Ok that looks good, thanks for the fix @ylc395