[gtk] (5 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:

  793014f... Use native Windows API for converting keystrokes to charact
  95b1135... GDK/Win32: Remove layered windows usage
  06b5a40... gdksurface-win32.c: Decouple mapped state from surface crea
  8e45099... gdkwin32-surface.c: Fix return type
  9d2fa47... GDK-WIN32 surface: WIP!

Commits added to the branch:

  fb3b99a... GDK/Win32: Remove layered windows usage
  94e5084... gdksurface-win32.c: Decouple mapped state from surface crea
  f68bd7d... gdkwin32-surface.c: Fix return type
  e298aef... gdk/win32: Rename 'margins' to 'shadow'
  d40da04... gdk/win32: Fix initial display of windows