External provider sign in / pop-up window v8

Hi, 

at the moment we are migrating OS from v6 to v8. The logon procedure in V6 and V8 is SSO, while login in V6 on there is a small pop-up window to choose an account for OS. This pop-up automatically closes after the choice.

In V8 the button External provider sign in is not there, instead via logon it opens a full window that does not close automatically. 

is there are solution to get this full web-page closed in v8?

 

thanks,