The Furnace in 7.0 won't let me select the bottom screen for fual and I can't take the item in the top box out.

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here
Select item to fual.
What actually happened was...:
Describe what happened here
I coudent select the fual box.

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. .Go to furnace and try to melt something.

3. ...