Show item/tag id in recipe editor when no icon is available

[MichelJonkman]

Currently tags are shown as a # character and modded items are shown as a missing texture, this isn't very useful as you need to hover over the item to see the id.

Even if the text gets quite small I think it'd be more useful to show the item id with a fairly high maximum amount of characters. The entire gui could be scaled up to compensate for the small text as well.