Fix error wrapping in interactive selection input

Resolve a TODO that was introduced when making the selection prompting
use text streams about wrapping error messages like they used to be
wrapped.

The use of console width within the generic error formatting code is a
bit ugly, but that needs to be resolved separately (and the old code
also had the console width hardcoded in a similar level).

Change-Id: Ia832a4884eef9bded50431fb5008d8191f52c246