[libgnome-games-support] (6 commits) Non-fast-forward update to branch arnaudb/wip/gtk4

[Arnaud B. <arnaudb src gnome org>]

The branch 'arnaudb/wip/gtk4' 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:

  c034e32... Compile with Gtk4.
  9fa76fa... Widgets are visible.
  8e265c1... Use show_title_buttons.
  1a88dee... Convert size_allocate.

Commits added to the branch:

  71775b6... Prepare 1.6.1 (*)
  7062155... Compile with Gtk4.
  84468a5... Widgets are visible.
  c6dd62d... Use show_title_buttons.
  bd859c7... Adapt to Stack API.
  23058ef... Convert size_allocate.

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