[gtk] (21 commits) Non-fast-forward update to branch wip/otte/puzzle

[Matthias Clasen <matthiasc src gnome org>]

The branch 'wip/otte/puzzle' 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:

  f379e8a... demo: Add the sliding puzzle demo
  16a970f... Keep aspect ratio of the image

Commits added to the branch:

  334c791... gesture: Fix get_last_event() docs (*)
  e9765c0... gesture: Fix code snippet (*)
  4d2b39d... gesturemultipress: Don’t fire ::released after ::cancel (*)
  c83441a... gdk: Add a private api to find sandboxes (*)
  60aeb15... x11: Don't set NET_WM_PID when sandboxed (*)
  8b24d59... Merge branch 'gesture-docs' into 'master' (*)
  f4c1a40... widget: Fix example code in doc (*)
  a70f035... GtkWindow: Handle non-square icons with height > width corr (*)
  7a5567b... Merge branch 'patch-1' into 'master' (*)
  4ab3aad... gl renderer: use w axis vector from graphene (*)
  758137b... widget: Add docs for {get,set}_focus_child (*)
  9109b0c... statusbar: Remove priv pointer (*)
  4e9a879... statusbar: Remove garbage from header file (*)
  a3987f3... bin: Remove public GtkBinPrivate typedef (*)
  d53c28b... aspectframe: Remove unused member (*)
  a1e3e9d... colorbutton: Remove priv pointer (*)
  5c24bbf... popover: Add missing close paren in docs (*)
  d93b9be... demo: Add the sliding puzzle demo
  ac01597... Keep aspect ratio of the image
  fae6a32... puzzle: Add a reshuffle button
  ec07349... Add tweaks

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