Improved modal user experience

I have made improvements to the modals on the game searching so that when logged out and you click a disabled checkbox you get the "You're logged out" modal.

I have additionally changed the modal so that individual errors can define a progression URL and call to action. If you set these new parms as false it works as before, but if you set it as "/login", "Login now" it will change the "Okie Doke" button accordingly.