Issue description:

Cannot right click to clear in autocrafting/item amount gui. May not be worth changing, but would be a nice change.

What happens:

Need to click, backspace and then enter custom amount.

What you expected to happen:

Right click, enter custom amount

Steps to reproduce:

1. Attempt to autocraft item or right click in processing pattern.
2. Attempt to set custom amount

Version (make sure you are on the latest version before reporting):

• Minecraft: 1.12.2
• Forge: 14.23.5.2768
• Refined Storage: 1.6.8

Single Player

I might PR this for the learning experience if it's simple enough depending on your policy on PRs from randoms.

Nevermind. I'm an idiot it's already selected you can just press backspace.... Sorry for polluting issues