Cleanup ContentTranslationHandler

Triggering D10

Seems like a good cleanup.

Only nit I would replace non multilingual with non-multilingual to be consistent.

Just addressed the small change mentioned in #22, thanks!

The last submitted patch, 23: 2575843-23.patch, failed testing. View results →

Random ckeditor

Committed 0d720c3 and pushed to 10.1.x. Thanks!

This is causing a PHP warning:

Warning: Undefined array key "#type" in Drupal\content_translation\ContentTranslationHandler->entityFormSharedElements() (line 602 of core/modules/content_translation/src/ContentTranslationHandler.php).

It looks like the fix would essentially revert this change so I'm just going to revert the commit for now.