Fix: Link bubble menu doesn’t display URL and title field for new links in the Content Editor

What does this MR do and why?

Fixes a bug that causes the link bubble menu to not update its state when the user moves the cursor position to a different link. This bug happens when switching between an empty and a non-empty link. You can use the following Markdown snippet to test in your local environment:

[GitLab](https://gitlab.com) and [Empty link]()

Screenshots or screen recordings

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How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

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Related to #366932 (closed)