[gtk] (12 commits) Non-fast-forward update to branch keymap-rework-2

[Matthias Clasen <matthiasc src gnome org>]

The branch 'keymap-rework-2' 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:

  eaf96b9... gdk: Make GdkKeymap a private api
  507ac8e... keymap: Remove virtual modifier mapping functions
  ed761c7... gtk: Stop using modifier intents
  83ea980... gtk: Drop gtk_widget_get_modifier_mask
  b906b16... display: Remove gdk_display_get_modifier_mask
  b6b671d... Remove uses of modifier intents in gdkevents.c
  fbc741d... gdk: Remove gdk_keymap_get_modifier_mask
  c001dc2... Drop gtk_accelerator_set_default_mod_mask
  d0c5d74... Reshuffle keymap docs
  ffed5ca... accelgroup: Small documentation updates
  52d54f9... Update migration guide
  e156ba6... reftests: Comment out a test that fails only in ci

Commits added to the branch:

  89ad789... gdk: Make GdkKeymap a private api
  dce8d25... keymap: Remove virtual modifier mapping functions
  c297d45... gtk: Stop using modifier intents
  3419d9c... gtk: Drop gtk_widget_get_modifier_mask
  99a344f... display: Remove gdk_display_get_modifier_mask
  14be8f6... Remove uses of modifier intents in gdkevents.c
  f7f103a... gdk: Remove gdk_keymap_get_modifier_mask
  1de7719... Drop gtk_accelerator_set_default_mod_mask
  93a1b30... Reshuffle keymap docs
  70fbf8d... accelgroup: Small documentation updates
  e7a8a4e... Update migration guide
  c03b7e4... reftests: Comment out a test that fails only in ci