"Retail" app doctype?

Hi,

Does anyone know why the Customer doctype is linked with “Retail” in the navigation menu? Customer is part of the Selling module, not Retail. I can’t actually find a doctype or module for “Retail”.

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I see a similar problem. The only domain I have enabled is Manufacturing. Can’t see a reason why all my Selling documents appear under Retail. Anyone else encountered?
Yet again, Does that really matter?