Silver Default

Several fixes were made thanks to the feedback of user DVD8084.

• The advancement icons and tooltips use wrong colors (yellow's in place of gray, and vice versa)
• The lit redstone ore models lack two files, redstone_ore_on_0.json and redstone_ore_on_1.json respectively, which results in the ore blocks sometimes losing their textures when they light up.
• The redstone_ore_on_4.png and redstone_ore_on_6.png files are flipped horizontally, which results in the texture sometimes flipping when the ore block lights up.

All of these issues have been fixed, so redstone ore now lights correctly, and the advancement menu now uses the correct colors.