Wet Concrete was lacking cell support as it was a 'molten' fluid type.
This patch adds a new type 'wet', which replaces 'molten'
for Concrete. This means with this patch you can either use
the canner with concrete dust to fill the cell, or the fluid
canning machine to input or output Wet Concrete.
Ideally Wet Concrete would be separate from Concrete as one is solid and
the other fluid, but they were kept together for compatibility with
existing recipes. 1 Concrete Cell = 144 Wet Concrete = Concrete Block
'Wet' fluid type can be used anytime you'd like both solid and fluid
cell support, as these were usually separate for good reasons.
Mostly to prevent the awkward ratio above.
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