Set GDM Default session (not the last used)
Some context: I own a Starlite V, and I use it as a hybrid PC with Gnome and Regolith Desktop. When I work at my desk, I use Regolith, then I turn off the computer and go away from keyboard. Then on the next use, I am on my couch and I boot in tablet mode, then GDM3 by default will send me back to the last session used (Regolith here), and… Bam!...