Reduce lag and memory consumption of replays list

[micheljung]

The reason why the replay list slows down the client is because it's adding one element per replay to a vertical pane instead of using the more efficient list view (which only renders elements that are visible).
This consumes a lot of memory and once the heap gets full, there's a lot of GC activity that causes high CPU load as well.

https://www.youtube.com/watch?v=-QQvybRgSUc

[Sheikah45]

Fixed with the pagination and flow pane