[gnome-session] (29 commits) Non-fast-forward update to branch wip/muktupavels/flashback

[Alberts Muktupāvels <muktupavels src gnome org>]

The branch 'wip/muktupavels/flashback' 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:

  b8c8b9b... don't use org.gnome.Shell for end session dialog

Commits added to the branch:

  0968b9f... Updated Chinese (Taiwan) translation (*)
  d4b969f... Updated Lithuanian translation (*)
  9b225c4... Updated Ukrainian translation (*)
  5be1faf... Update simplified Chinese translation (*)
  9f40b2c... Updated Czech translation (*)
  4af3f87... Updated Polish translation (*)
  9e4f4df... Updated Korean translation (*)
  5ec79fd... Updated Serbian translation (*)
  e30fa72... Update Catalan translation (*)
  355d1ca... fail-whale: fail if the fail whale fails (*)
  cf40833... Fix SessionIsActive property (*)
  cd84c50... manager: don't connect to systemd until exported on bus (*)
  5925f9c... Updated Bulgarian translation (*)
  635d6f6... fail-whale: use correct gspawn flags (*)
  79662d2... Updated Tajik translation (*)
  f976a59... Updated Italian translation (*)
  7a3f55e... Finnish translation update (*)
  6aceafa... Updated Latvian translation (*)
  2decad1... Updated Bosnian translation (*)
  7bbd3b9... Translation pa updated for Gnome (*)
  fc9d524... Translation pa updated for Gnome (*)
  4d0d1f5... Updated Vietnamese translation (*)
  bbb3eb1... Updated Danish translation (*)
  d393009... NEWS: update for release (*)
  9ae7a26... configure: bump to 3.15.92 (*)
  4869faf... NEWS: update for release (*)
  cf4083a... configure: bump to 3.16.0 (*)
  e0e5371... l10n: Update Japanese translation (*)
  e84b56f... don't use org.gnome.Shell for end session dialog

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