Damien Mat Jedrzejewski authored Feb 08, 2021 and hydrargyrum committed Feb 12, 2021

When reloading state and requesting the last page visited,
when that page is one of the one in json_pages.py,
we are usally logged out.
This is handled in AccountJsonPage with a special Logged property.
But it needs to be as well in the other pages.
We do that by introducing a LoggedDetectionMixin,
inherited by a SGPEJsonPage, common to all subsequent pages.