Add default grindstone category#1882

Sleepy-Horse wants to merge 5 commits intoshedaniel:19.x-1.21.5shedaniel/RoughlyEnoughItems:19.x-1.21.5from

Sleepy-Horse:19.x-1.21.5-grindstone-categorySleepy-Horse/RoughlyEnoughItems:19.x-1.21.5-grindstone-categoryCopy head branch name to clipboard