Temporarily disabled hitbox scaling due to some problems

Replaced error,mdl with another effect
Hitboxes are now scaled with the sprite
Added default values to slider hints

MAKE SPRITE SIZE CONFIGURABLE!! from 16 to 16384
Fixed bug with moving sound URL buttons
Removed unused language phrases

Changed cache file naming mechanism to fix errors with some links
Slightly weakened the link validation

Added error chat notifications
Added "Loading" material
Added a note about the required settings