The desk's prompt named only the module and the secret's key, so the operator
asking for one of mesh-mail's mail-credential-* accounts could not tell which
one. node-launcher.secret (modules/rofi) now shows the controller's optional
what as its own line under the module and secret names, escaped as text so
the catalogue's words never reach the prompt as markup; omitted as before
when none is declared. mesh-mail's mail-credential-* family now declares that
line with the long-form own-secrets shape the controller's manifest parser
reads (novox/hq issue 789 part b; part a landed in mesh-controller).