Update status msg when nuke msgbox is dismissed.
Update status msg when nuke msgbox is dismissed.

Either by Esc or mistyping the confirmation prompt. Previously was only updated if cancelled at the countdown stage, which could be confusing.

Tarsnap/tarsnap-gui,shinnok/tarsnap-gui,Tarsnap/tarsnap-gui,shinnok/tarsnap-gui,shinnok/tarsnap-gui,shinnok/tarsnap-gui,Tarsnap/tarsnap-gui,shinnok/tarsnap-gui,Tarsnap/tarsnap-gui,Tarsnap/tarsnap-gui