Fix: NaN fixes for large reactor startups

Rare issue could happen when one fuel rod emitted radiation into another
fuel rod that had not yet generated heat, causing a NaN cascade. More
common in very large reactors.
Bugfix: Inv automation on top/bottom faces

Top/bottom faces were erroneously excluded from automation but not from
the UI. Fixing automation and autoemit.
TE: Yellorite ore induction smelter recipe