Enhancement: Add small previews for songs in freeplay menu

[JackXson-Real]

Read title. I know it used to be a thing in pre week 7 builds that the entire song would play when hovering over a song in freeplay, but I belive that was removed because it caused lag. I feel like it might be better to just have small previews of the songs play every time since that would sound better and most likely cause less lag (maybe?) It's also kind of inconsistent since Random is the only one that plays a song when hovered over.