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commit 22c332ba and some follow up commits try to ensure the user never stays on a blank VT by jumping to a login screen in the event they'd end up on one. Unfortunately, that part of the code can't start a login screen if there's not one running at all. This commit moves the code to GdmLocalDisplyFactory where the login screens are created, so users won't end up on a blank VT even if no login screen is yet running.
5e737a57