[gtk] (6 commits) ...Merge branch 'master.win32' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  07166a5... gdksurface-win32.c: Deal with modal and decoration props (*)
  85706dc... gdkglcontext-win32.c: Create a global shared GL context (*)
  d6955d4... gskrenderer.c: Default to the GL renderer on Windows too (*)
  c979798... demos: Fix running on Visual Studio builds (*)
  20388f8... GDK-Win32: Use SetProcessDpiAwarenessContext() where availa (*)
  358f664... Merge branch 'master.win32' into 'master'

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