Fix nullness errors#348

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blerner wants to merge 3 commits intomasterfrom

fix-nullness-errors

Commits on Oct 30, 2021

lots of "fixes" for useStrictNull checks
Ben Lerner
committed
more fixes
Ben Lerner
committed
slightly hacky -- deliberately bypassing the typechecker since we need to pass in a value to keep the prop controlled, but need it to represent "nothing selected"
Ben Lerner
committed