Add `prefixEnabled` property to allow the prefix to be disabled#415

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scottyab wants to merge 2 commits intosplitwise:mainfrom

Commits on Feb 23, 2021

Add `prefixEnabled` property to allow the prefix to be disabled as it's causing the text to be cleared when called from OnRestoreState()
scottyab
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Commits on Feb 24, 2021

Add prefixEnabled to the SaveSave in onSaveInstanceState
scottyab
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