FeaturedBefore

Adds

• An invalid written book in the creative inventory tab
• A blank enchanted book in the creative inventory tab
• Knowledge book in the creative inventory tab
• Uncraftable potion, splash- and lingering potion in the creative inventory tab
• Frosted ice as an item
• Horse saddle that works like a normal saddle but only for horses and stacks up to 32
• Rose (both from je and pe)
• Cave air as an item
• Void air as an item
• Bubble Column as an item