[gtk] (19 commits) Non-fast-forward update to branch wip.win32.fixes

[Chun-wei Fan <fanchunwei src gnome org>]

The branch 'wip.win32.fixes' 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:

  7894a6d... demos/gtk-demo: Temporarily disable gui_app attribute
  cace64f... GDK/Win32: Remove layered windows usage
  c3b353a... gdksurface-win32.c: Decouple mapped state from surface crea
  6498cb4... gdkwin32-surface.c: Fix return type
  634c3aa... gdk/win32: Rename 'margins' to 'shadow'
  2a5c10f... gdk/win32: Fix window display and resizing

Commits added to the branch:

  57691ea... seatdefault: rename dispose method (*)
  a720d8b... seatdefault: use g_clear_pointer to unref the tools (*)
  d5ef906... Merge branch 'nacho/seatdefault' into 'master' (*)
  8243b54... a11y: Avoid __ prefixes for variable names (*)
  99b2da4... gtk/gtksecurememoryprivate.h: Include glib.h (*)
  2b8ad6c... gtkffmediafile.c: Use g_snprintf() (*)
  441d944... droptarget: Some docs cleanups (*)
  897164c... Merge branch 'matthiasc/for-master' into 'master' (*)
  2b6b35d... build: Add a sassc feature (*)
  6083522... 4.0.1 (*)
  d205265... Update Polish translation (*)
  946a496... Update Basque translation (*)
  506423c... Update Basque translation (*)
  f7467f4... demos/gtk-demo: Temporarily disable gui_app attribute
  75f1694... GDK/Win32: Remove layered windows usage
  15cd9e4... gdksurface-win32.c: Decouple mapped state from surface crea
  9045e46... gdkwin32-surface.c: Fix return type
  f129079... gdk/win32: Rename 'margins' to 'shadow'
  606698b... gdk/win32: Fix window display and resizing

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