Creatures Tab

[Kruithne]

Implement a "Creatures" tab which utilizes the Creature.db2 table to show available creatures in the game data. The idea behind this is that we would want to be able to go directly to a 3D model in the "Models" tab for a creature or if it's a character-based creature, to the "Characters" tab with the necessary customization and baked textures applied.

This would supercede the current "Apply Baked Texture" feature that's been shoe-horned in. The interface should be minimal, similar to the items tab where you can go from an item to another tab as an aggreate view.