Add option to jail non-logged-in Users to login-page only

[LokeYourC3PH]

Is your feature request related to a problem? Please describe.
Not directly.

Describe the solution you'd like
I would like there to be a toggle, in the General or Security section, which allows non-logged-in Users to only access the login page and none other, especially not the Overview page as it could result in a data leak.

Describe alternatives you've considered

Additional context
PS: I am aware of the "Module Access" feature for each module, but I think having a Universal/Unified toggle might make it more streamlined for those who just simply need everything disabled, even the Overview page itself. This stems from the fact that, the Calendar, Birthdays, and plenty other features (even with all "Module Access" settings set to "Logged-in Users only") are still available on the Overview page to non-logged-in Users as well.