This provides a way to restore earlier QtWebEngine behavior where
geolocation was possible from all origins.

[ChangeLog][Settings] Added setting to again allow insecure origins
to request geolocation.

Change-Id: I043fb7a36a56fa5acc1740d52a50b9d7ff49a2c5
Reviewed-by: Michael Brüning <michael.bruning@qt.io>