[gtk] (6 commits) Non-fast-forward update to branch fix-3728-3799

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

The branch 'fix-3728-3799' 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:

  02ea9f7... GDK-Win32: Make surface ready for updates
  6d8eae1... gdksurface-win32.c: Rename window->surface as appropriate

Commits added to the branch:

  257adb4... gtk: fix Snapshot.push_shadow annotation (*)
  e98b83d... Merge branch 'bilelmoussaoui/gtk-snapshot' into 'master' (*)
  24b7eec... Update Brazilian Portuguese translation (*)
  71eece2... Update Icelandic translation (*)
  b6836a9... GDK-Win32: Make surface ready for updates
  1ffe7fa... gdksurface-win32.c: Rename window->surface as appropriate

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