[gnome-builder] (6 commits) Non-fast-forward update to branch wip/chergert/pipeline

[Christian Hergert <chergert src gnome org>]

The branch 'wip/chergert/pipeline' 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:

  eba0543... wip: start on build pipeline/stages

Commits added to the branch:

  3913eda... workbench: add each window to its own group (*)
  ce4e351... workbench: use autoptr (*)
  17a602f... application: make About dialog modal (*)
  9dd5897... application: use most-recent workbench for shortcuts parent (*)
  c647bda... configuration: return default from gsettings when unset (*)
  cee9ce2... wip: start on build pipeline/stages

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