Creating a block with form errors should scroll the modal to the messages area

Attaching .patch to use with composer.json

MR is ready to review. Note that the code only works if the messages div has "role=alert"

Hi @carolpettirossi I've reviewed your patch (3375915-creating_block_form_errors_scroll-3.patch) and can confirm the modal scrolls up when an error on the form occurs. Please refer to the attached image for reference. Appreciate your efforts!

Minor change, but the `once` dependency should be included in the wrapper function.

So:

(function (Drupal, drupalSettings) {
[...]
})(Drupal, drupalSettings);

becomes:

((Drupal, drupalSettings, once) => {
[...]
})(Drupal, drupalSettings, once);

Also, this should be run through eslint, as it doesn't match Drupal's Prettier rules (single quotes instead of double quotes, no unnamed funcs, incomplete code comments // If no error messages exist, the etc.)

Hi, I have updated the changes in this patch. please review.

The new patch is just for my suggested changes against the 8.x branch and not updating the existing patch. It also does not include eslint changes.