Fix progress related bugs (divide by zero crash for certain window wi…

[johanste]

…dth/message length combinations, failure to show/hide cursor when stdout redirected)

[azurecla]

Hi @johanste, I'm your friendly neighborhood Azure Pull Request Bot (You can call me AZPRBOT). Thanks for your contribution!

It looks like you're working at Microsoft (johanste). If you're full-time, we DON'T require a contribution license agreement.

If you are a vendor, DO please sign the electronic contribution license agreement. It will take 2 minutes and there's no faxing! https://cla.azure.com.

TTYL, AZPRBOT;