[Feature Request] Collapse cross posts into the same post in the post feed

[Ategon]

Behaviour in lemmy-ui is to collapse posts with the same url into the same post in the post feed (showing the duplicates in a cross-posted to section). Alexandrite doesn't follow that standard and instead shows all of the posts separately which can flood the feed if the same thing is being crossposted to multiple spots

To fix you can add in a cross-posted to section below the post in the post feed and move duplicate posts out of the posts that you are currently showing the user there. In lemmy-ui the oldest one is the one that still shows. (Duplicate posts are just ones with the same url)