[gtk] (8 commits) Non-fast-forward update to branch wip/settings-portal

[Matthias Clasen <matthiasc src gnome org>]

The branch 'wip/settings-portal' 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:

  630ddea... Use a simpler sandbox check
  6f58c31... Move the should_use_portal helper to gdk
  01d80de... wayland: Support the settings portal
  ce6b319... Use ReadAll

Commits added to the branch:

  88c77eb... Update GDK_OSX versions to current MacOS release. (*)
  e457a78... Use [NSGraphicsContext CGContext] instead of graphicsPort a (*)
  e31187e... GdkQuartz: Handle NULL from [NSGraphicsContext currentConte (*)
  1e39f99... wayland: Remove GNOME Classic-specific workaround (*)
  833442e... Merge branch 'wip/fmuellner/deco-setting' into 'master' (*)
  356eb2c... Use a simpler sandbox check
  00efd55... Move the should_use_portal helper to gdk
  98495bf... wayland: Support the settings portal

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