Java Edition 1.13-pre2

1.13-pre2 is the second pre-release for 1.13.

Additions

 * Added stripped bark blocks of all 6 types of wood
 * Packed ice can now be crafted from 9 ice.

Changes

 * Optimized title screen.
 * Reverted the bark block changes from version 1.13-pre1.
 * Various performance optimizations.
 * Inventory
 * Items with a rarity value will have their tooltips displayed as their respective colours when highlighted, rather than just being white.
 * Zombie Horse
 * Now sinks in water.
 * Updated model to fix serious Z-fighting.