canceling heroku pg:backups:restore command will hide the cursor in console

[keiko713]

how to repro:

1. run heroku pg:backups:restore b001 DATABASE_URL -a myapp -c myapp
2. it says this log message: https://github.com/heroku/heroku-pg/blob/master/commands/backups/restore.js#L62-L66
3. do Ctrl+C
4. the canceling to see the progress part is going well, but the cursor is gone

running things like reset works but it is pretty annoying, and I don't really know why it is happening.