forUnlicensing

Reshapes an owner long name on the way back out of licensed mode.

A fully composed name survives untouched — KD2ABC//Attic Heltec is exactly what the node is called, and an operator clearing the toggle has no reason to lose it. Only the half-filled name left by an abandoned onboarding, where no call sign was ever entered, is flattened, so a stray separator cannot become the node's name.