Days to Keep scores more than 7 days

Hello,

I think it's can be good for everybody to have the possibility to change the option in Tools > Global Settings > Days to Keep scores more than 7 days (for example : 7 days is set by default but you can change to 15 days if you want).

Thanks to that, you can create more accurate dashboard which used to make the difference between the past and the current week discovery (I already create that one but I insert some calculation for have a correct comparison).