Cherry Pick into 16.9 - Fix triggering the outer application's signature help when triggering an inner application inside a lambda (#10954)#10973

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cartermp merged 1 commit intodotnet:release/dev16.9from

cartermp:cp_sighelptriggering1

Feb 1, 2021

Commits on Jan 29, 2021

Fix triggering the outer application's signature help when triggering an inner application inside a lambda (#10954)
cartermp
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