[gtk] (4 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:

  356eb2c... Use a simpler sandbox check
  00efd55... Move the should_use_portal helper to gdk
  cf3acc9... wayland: Support the settings portal
  ab5468f... Support the fontconfig timestamp

Commits added to the branch:

  1c46560... Use a simpler sandbox check
  8099669... Move the should_use_portal helper to gdk
  5a90940... wayland: Support the settings portal
  2459e62... Support the fontconfig timestamp