[gtk] (12 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:

  0ac67fa... demos/gtk-demo|widget-factory: Temporarily disable gui_app 
  02276aa... media/gstreamer: Support using GL for video for Windows
  2557081... spinbutton demo: Mark signal handler symbols for export
  9a07bd5... listview_filebrowser.c: Export symbols as needed
  5528dd6... shortcut window demo: Mark signal handler symbols for expor
  5a041a2... font feature demo: Export signal handler symbols

Commits added to the branch:

  d94c386... label: Make hidden mnemonics work again (*)
  13b94da... Conditional check for gdesktopappinfo header (*)
  bd7b29a... Only compile gtkmountoperation-stub if the X11 backend is n (*)
  12d5911... Fix compilation of c++ test: cpp_args (*)
  c98dd1a... emoji: Use a portable and configuration-dependent path to l (*)
  4a4525a... emoji: remove duplicated include (*)
  e00785e... Merge branch 'macos' into 'master' (*)
  febd143... Merge branch 'emoji-data-prefix-fix' into 'master' (*)
  59cc3a9... Merge branch 'hidden-mnemonics-fix' into 'master' (*)
  5385317... demos/gtk-demo|widget-factory: Temporarily disable gui_app 
  4215726... media/gstreamer: Support using GL for video for Windows
  bc61506... demos: Mark non-static signal handler symbols for export

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