[gdm] (5 commits) Non-fast-forward update to branch wip/try-harder-to-get-a-login-screen

[Ray Strode <halfline src gnome org>]

The branch 'wip/try-harder-to-get-a-login-screen' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  b48f1be... manager: make get_login_window_session_id fail if no login 
  2ef5c5c... common: dedupe gdm_get_login_window_session_id
  7ef5101... common: dedupe activate_session_id
  2dbe412... daemon: try harder to get to a login screen at logout

Commits added to the branch:

  77c791a... Merge branch 'wip/use-wayland-when-user-switching' into 'ma (*)
  2352143... manager: make get_login_window_session_id fail if no login 
  0e9f09d... common: dedupe gdm_get_login_window_session_id
  6574b4f... common: dedupe activate_session_id
  5e737a5... daemon: try harder to get to a login screen at logout

(*) This commit already existed in another branch; no separate mail sent