Cooking recipes run in all visinv nodes, not just
item stacks, BUT non-stack-only nodes (i.e. all
storeboxes) block flame touchgroups so things
in boxes cannot be heated/melted.
This allows items dropped into boxes from ore
melting to cool, but prevents sand from being
melted in a box which would naively replace
the box with the molten glass entirely.
This also fixes an old rumored bug where forcing
glowing lode items into a shelf with a door would
cause them to stay hot indefinitely.
N.B. lode cooking/cooling used to assume it could
replace the entire node, and deleted the thing
as a fail-safe when an item of the given temper
was not found (e.g. tools w/ handles). This is
now gone, and invalid tempers will throw errors
if they can ever be achieved in practice.
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