Added popup for opengameview

If the game is closed while you are submitting an estimate, you are prompted with a popup. IF you select yes, you are returned to MainView.  If you select no, you remain in OpenGameView, but the buttons are disabled.

Committed by: ajthompson

Note: I still haven't managed to get the card select panel to disable.  I'm getting this up so that you can restructure the UI.