[libgd] (10 commits) Non-fast-forward update to branch wip/ernestask/gtk4

[Ernestas Kulik <ernestask src gnome org>]

The branch 'wip/ernestask/gtk4' 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:

  c103077... Add test for GdNotification
  9e43884... notification: use g_timeout_add()
  81d0080... notification: remove include_internals from forall()
  fd42a42... notification: remove draw vfunc override
  2d37731... notification: use gtk_widget_measure()
  8373d3d... notification: use an event controller for motion events
  40be2e7... notification: remove visibility_notify_event override
  9439e26... notification: use gtk_widget_get_allocated_height()
  f8b8ec2... notification: default to being invisible
  4ac77ab... Remove GdNotification

Commits added to the branch:

  6493e20... Add test for GdNotification
  5457fe0... notification: use g_timeout_add()
  fdfd7a6... notification: remove include_internals from forall()
  9a00c5f... notification: use snapshot API for drawing
  4e70309... notification: use gtk_widget_measure()
  46e31a7... notification: use an event controller for motion events
  400ec89... notification: remove visibility_notify_event override
  6397ba3... notification: default to being invisible
  a4ec2a7... Remove GdNotification
  b2c278a... Revert "Remove GdNotification"