Clarify warning message with one aggregate.
Clarify warning message with one aggregate.

When deleting resources at a single aggregate, make the confirmation
question indicate that. When deleting from all aggregates, say so
clearly in the message.

charliemeyer/geni-portal,tcmitchell/geni-portal,tcmitchell/geni-portal,charliemeyer/geni-portal,charliemeyer/geni-portal,tcmitchell/geni-portal,charliemeyer/geni-portal,tcmitchell/geni-portal,tcmitchell/geni-portal,charliemeyer/geni-portal