Add an Allow Empty Search prop to search on focus

[praem90]

[coveralls]

Pull Request Test Coverage Report for Build 73

• 6 of 6 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.09%) to 96.552%

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Totals
Change from base Build 57:	0.09%
Covered Lines:	159
Relevant Lines:	163

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💛 - Coveralls