Automatic slug update does not work on SBS form

[seluianova]

Describe the Bug

When the user changes the page title in the editor, the page slug is automatically updated (see slugify_ajax() function). But this doesn't happen when the page is edited in the side-by-side translation view.

Steps to Reproduce

1. Go to any page form
2. Open "Translator View" for any language with an existing translation
3. Try to change the title for the page translation

Expected Behavior

The same behavior as on the page form: Slug should be updated automatically in the form, and the updated slug should be saved when saving or publishing changes.

Actual Behavior

Slug is not updated automatically, nor is it updated when saving/publishing a translation

Additional Information