[gtk] (18 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:

  8f0d94c... win32: Stop using MOD2..MOD5
  23e3aca... broadway: Stop using MOD2..MOD5
  1fcae70... events: Stop doing elaborate virtual modifier handling
  56441fa... gtk: Remove handling of virtual modifiers
  86d7547... gdk: Redo key events
  c7c3323... gdk: Clean up GdkModifierType
  d671892... gdk: Make GdkKeymap a private api
  58d6616... keymap: Remove virtual modifier mapping functions
  543f871... gtk: Stop using modifier intents
  7caf8f2... gtk: Drop gtk_widget_get_modifier_mask
  bb8e3dc... display: Remove gdk_display_get_modifier_mask
  6dbd26a... Remove uses of modifier intents in gdkevents.c
  c143f6b... gdk: Remove gdk_keymap_get_modifier_mask
  ef348c5... Drop gtk_accelerator_set_default_mod_mask
  6ff32f8... Reshuffle keymap docs
  4039a81... accelgroup: Small documentation updates
  d96db04... Uodate migration guide

Commits added to the branch:

  25e9a54... win32: Stop using MODx modifiers
  be2a097... broadway: Stop using MOD2..MOD5
  5ce05a8... events: Stop doing elaborate virtual modifier handling
  5071367... gtk: Remove handling of virtual modifiers
  0a96a48... gdk: Redo key events
  3300686... gdk: Clean up GdkModifierType
  275e634... gdk: Make GdkKeymap a private api
  0362d47... keymap: Remove virtual modifier mapping functions
  5dadb49... gtk: Stop using modifier intents
  eeeef9b... gtk: Drop gtk_widget_get_modifier_mask
  d72762d... display: Remove gdk_display_get_modifier_mask
  52049c8... Remove uses of modifier intents in gdkevents.c
  d1ea6bb... gdk: Remove gdk_keymap_get_modifier_mask
  3aeeeb8... Drop gtk_accelerator_set_default_mod_mask
  10424db... Reshuffle keymap docs
  925b8b9... accelgroup: Small documentation updates
  c77cf9e... Update migration guide
  48239de... reftests: Comment out a test that fails only in ci