Fixes links to notes in collapsed discussions

What does this MR do?

Adds a hashchange listener to window to handle all of the referenced links in comments. They are basically anchor tags and they will update the hash of the URL, so we need a global hashchange listener.

Screenshots

Before	After

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Related to #28985 (closed)