Issue description:

Placing an item in an item/drying rack which has a non-flat 3d model will be rendered as block, and items with no bock form will be rendered as the pink and black missing model/texture block.
A easy way to see this issue is to place something like a shield in the item/drying rack.
The solution to this is pretty easy, just render items in item/drying racks as items no matter what their 3d model is, this won't affect the current visuals as every block's blockmodel matches it's itemmodel

Tinker's construct Version: 2.13.0.183
Mantle Version: 1.3.3.55
Minecraft version: 1.12.2
Forge Version: 14.23.5.2854

This affects anything with a TESR model, in other words anything that extends builtin/entity. Known issue, no easy fix with how racks work. Dealt with for 1.16