Summary: Fixes remaining references to `ReactElement` that did not already have `React` in scope. Reviewed By: bestander, vjeux Differential Revision: D4022022 fbshipit-source-id: 4aeacee0cdbb2c825feba10282208316d064c578
Reviewed By: lexs Differential Revision: D3987463 fbshipit-source-id: fa8f1d1bea7ed699120b9705ddc1c83767fcf8e4