Better UX indicator for "New Changes were added"

Summary

While reviewing a large merge request, it would be very nice if the UI could highlight that this sections has new changes.

ATM I spent reviewing a large merge request and then there was a tiny note at the top of the web page (outside of my field of view area as I'm scrolling down while reviewing) that there was changes..

This needs to be made visible right away in the field of view of my eyes. Hiding it somewhere in the HTML markup outside of my render field doesn't make sense.

Steps to reproduce

Huge merge request. Pretend you are reviewing a huge diff. Someone pushes and updates code that is further down diff you haven't reviewed yet. You are reviewing outdated code without being aware of it.

Example Project

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What is the current bug behavior?

It creates HTML markup with New changes were added. Reload the page to review them under the Overview tab in a merge request.

What is the expected correct behavior?

Something smarter that puts the same message but in field of view of your eyes right away. Maybe a yellow border on top? Maybe something highlighting the sections without refreshing the page in the diff view?

Relevant logs and/or screenshots

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Output of checks

This bug happens on GitLab.com

Results of GitLab environment info

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Results of GitLab application Check

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Possible fixes

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