Fix additional PowerShell warning (take two) #5100
Merged
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Since Show Session Menu always fully enumerates the iterator we needed to move the existence check into the generator. Fortunately the 'exists' method was already idempotent. I'd like this to be cleaner, but at least the tests now make sense (and required a stub fix).
This is a follow up to #5099 after further testing.
@JustinGrote can you think of a way to simplify this logic?