Allow ref on items not yet displayed. (see below for more info)

[briannovak]

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With the release of 2.0.2 and the addition of the console.warning for empty nodes/refs, this adds unnecessary information in our logs because we have app-level Modals that are rendered but not displayed until a certain condition exists. Thus the ref is undefined and causes the warning.

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Allow modals and other things rendered in the background to not trigger this warning.

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Turning console warnings off

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