[craft] sign reject bad item names

[John Mancino II]

currently it will take bad item names and take the items but not produce anything example: melon_block will take 9 slices but not produce an item, the correct usage is: melonblock, but no error. you can also put item IDs and it will not reject them, as well as other bad item names, but they do not take items (gold_ingot, for example)

[Anna Bakker]

If you try something that won't work it shouldn't be doing anything with the items. melonblock only takes items because of #75

[John Mancino II]

it looks like #75 is resolved.

if possible could it reject bad item names with red text?