Add option to move the card selection area to popout window for session creator

[byamagata]

As a Scrum Master and Developer, I cannot usually send my vote in while running planning poker over something like zoom because when I share my screen for everyone to see, they can see the vote that I cast too. This is not great when trying to make sure that we have impartial voting.

If we could move the card selection area to a different window for the creator, that would be great!

What does everyone else think?