Discuss activating Persistent Storage after login
This came up during !1035 (merged): https://gitlab.tails.boum.org/tails/tails/-/blob/d845a7408223c65c4d71570937dcac683acaa568/wiki/src/contribute/design/Persistent_Storage.mdwn#L186-191
We also don't support activating Persistent Storage after logging into
the GNOME Session. It's full of corner cases, and we consider that
doing this in a way that gives a consistent interface to the user is
very expensive and not worth it.
XXX: Which corner cases? What's expensive about that? I think I already
implemented that.