Add the option to close the popup on background click

[nleduc]

I think some users expect an exit intent popup to close when the background is clicked and I believe it is a useful option to have.

[justinroodman]

Isn't this a more complicated way of achieving the same thing as noted here?

[nleduc]

It's actually done the same way. I just made it a configurable option people can use rather than require them to add it to the code themselves.

[justinroodman]

Configurability is nice. Thank you for the clarification.