Describe your enhancement

Most of the time when I insert filled pattern into the pattern grid - it's because I want to edit it. The other, smaller half of the time I just want to erase it and write something else. I think a feature where the contents of the pattern get loaded into the pattern grid would be nice and useful. It's just a QoL feature, though.

Reasoning: It's a bit tiring trying to rewrite all smelting patterns from 1->1 to 64->64

If you re-insert a pattern in the pattern grid, it applies the pattern contents back in the slots, so you can edit them?
This is already a thing.

You can insert the pattern into the output slot to refill the grid with the pattern.