Simplify retrieval of IS_FIRST_RUN setting.
Simplify retrieval of IS_FIRST_RUN setting.

The previous implementation:

	1. Assumes that the relevant key exists in the Dictionary.
	2. Returns true if the value is null, empty or whitespace, or
	   unparsable.  Otherwise, it returns the parsed value.

This simplifies the code while capturing the same logic.

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