Sidebar Scrollbar similar to Discourse/Flarum

[Emotion]

Hi, I would like to display a scrollbar to the right of topics. NodeBB already has the scrollbar but it's embedded in the pagination block in the bottom right corner.

I tried modifying the code in the scrollbar.tpl file (persona template) but it did not work which is not surprising since the code in there is just an HTML container.

Any help would be appreciated.