player-frequenting.user.js: Add checkbox on-click event handlers.
player-frequenting.user.js: Add checkbox on-click event handlers.

MNoelJones/ingress-intel-total-conversion,MNoelJones/ingress-intel-total-conversion,MNoelJones/ingress-intel-total-conversion,MNoelJones/ingress-intel-total-conversion,MNoelJones/ingress-intel-total-conversion,MNoelJones/ingress-intel-total-conversion