Cannot insert text before or after a widget inside a list item

[FilipTokarski]

📝 Provide detailed reproduction steps (if any)

1. Switch to ck/10812-document-list-editing
2. Create a list with widget inside one of the list items
3. Try using fake caret to insert the text before or after the widget

✔️ Expected result

When using fake caret/pressing enter you are still in the same list item and are able to type.

❌ Actual result

A new paragraph is created, list gets split into two separate lists.

Screencast

0_list6.mp4

---

If you'd like to see this fixed sooner, add a 👍 reaction to this post.

[FilipTokarski]

Fixed on latest ck/11198-make-sure-list-isnt-split.

[oleq]

Closed in #11425.