Fix dedicated server NoClassDefFoundError

Leaderboards! 

Cache all offline player bestiary tags, load and assign them on login (mostly affects servers/shared singleplayer worlds)

Bestiary tag holds player display name

SO. MANY. BUG. FIXES.

UI tweaks

Level up toast scaling config option

Slight optimizations

Scroll bars for main screen and side screen

Fixed another hardcoded levels-per-point bug

Better gaurding against invalid mobs

Blacklist for valid mobs, and whitelist for mobs with MISC category (config)

Backwards forge compatibility (for optifine)