Graphical session targets as standard

[martin.pitt@xxxxxxxxxx (Martin Pitt)]

Hello Alberto,

Alberto Salvia Novella [2018-07-04  1:56 +0200]:
> Requested on:
> - gitlab.gnome.org/GNOME/gdm/issues/396
> - github.com/CanonicalLtd/lightdm/issues/29
> - github.com/sddm/sddm/issues/1044
> - bugs.freedesktop.org/show_bug.cgi?id=107107

These are invalid, please see my previous reply on the list.
Also, please don't cut away the https:// from links, this makes it impossible
to click on them.

Martin