[gnome-shell] (16 commits) Non-fast-forward update to branch wip/laney/systemd-user

[Iain Lane <iainl src gnome org>]

The branch 'wip/laney/systemd-user' 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:

  c8bb126... endSessionDialog, loginManager: Get the session ID from log

Commits added to the branch:

  ccadf6a... workspaceThumbnail: remove unused private win reference (*)
  d0bdea3... workspace: Don't keep stale clones in list (*)
  d9a1434... workspaceThumbnail: Don't keep stale clones in list (*)
  d5e8f17... Bump version to 3.29.3 (*)
  fc5ab44... keyboard: Implement standalone FocusTracker (*)
  e3ebc8d... keyboard: Remove stale references to global.screen (*)
  4bf033a... st: Make StScrollables' paint volume reflect the unconstrai (*)
  86a520b... st: Clip StEntry to allocation (*)
  ab4c72d... st-box-layout: Queue relayout on adjustment changes (*)
  b1b455f... st-adjustment: Mark all properties as EXPLICIT_NOTIFY (*)
  e7f2e92... events: Re-use event messages where possible (*)
  50e849a... st-texture-cache: Obey cache policy in st_texture_cache_loa (*)
  2e90c5f... popupMenu: Don't handle key presses directly if there are m (*)
  4a7082b... switcherPopup: Cancel window cycling with Tab (*)
  905801b... panel: Allow restoring maximized/tiled windows by touch (*)
  233fb05... endSessionDialog, loginManager: Get the session ID from log

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