fixes technical issues with the old beetles hitboxes

Increased BB height because it's not possible to animate it, and the beetles rose and flew outside of the hitbox. Removed X Y translations shown in nifskope, they don't work in the game, so the heads were even more out of the hitbox than you could see.

Animation files of the first 3 beetles are edited to center the body with the BB. If anyone edits that later, remember they used quadratic interpolation types and should probably not be imported then exported in the old blender plugin.