Kelp cannot be cooked in the smoker

The bug: Dried Kelp is food and smokers cannot cook kelp. Smokers are specified for cooking food. If potatoes can, why not kelp? Smokers are not specialized for meat if it can cook not animal food.

Step to reproduce:

1. Get some kelp
2. Craft a smoker
3. Get some fuel
4. Place the smoker
5. Try to cook the kelp