multiple selection selectionBehavior

[snowystinger]

🙋 Feature Request

We need to add a prop for selectionBehavior?: 'toggle' | 'replace' that will cause selections to work like they do in Mac Finder, where pressing without any modifier keys will replace the entire selection. This is unlike toggle, which if pressed, will add to the selection or remove that item from the selection without affecting the rest of the selection.
This is split out from #1905

Should this be selectionStyle?: 'checkbox' | 'highlight'?

🤔 Expected Behavior

😯 Current Behavior

💁 Possible Solution

🔦 Context

💻 Examples

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