Unable to load more posts in lists

Hi!

The lists display 20 posts by default, and should load more once the scrolling is finished

However this feature does not work, and the "load more" button is not displayed either.

mentioned in issue pleroma#2625 (closed)

mentioned in issue pleroma#2693 (closed)

mentioned in merge request pleroma!3477 (merged)

mentioned in commit pleroma@7acdab1f