[gtk] (27 commits) ...Merge branch 'wip/carlosg/input-cleanups' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  4fe608e... gtkwidget: Cancel all gestures in other groups (*)
  31b95ce... gtkmain: Look up transient-for hierarchies to determine mod (*)
  c1d9027... gdk: Drop GDK_SOURCE_ERASER (*)
  59a8106... gdk: Drop supports_multidevice API (*)
  5f29b8f... gdk: Drop GdkGrabOwnership (*)
  6d2860e... gdk: Drop gdk_seat_get_logical_pointers() (*)
  cf1fbdf... gdk: Add gdk_event_get_seat() (*)
  7be6afe... gdk: Depend less on gdk_event_get_device() (*)
  29d054c... gtkwidget: Remove dead code (*)
  f872eb6... gtkmain: Drop unused struct field (*)
  42ed8a2... gtkwidget: Drop _gtk_widget_get_device_surface() (*)
  f401b05... gtkwidget: Avoid poking surfaces and events in gtk_widget_l (*)
  469a4a7... gdk: Drop gdk_device_get_last_event_surface() (*)
  8031036... gtkwindowhandle: Drop has-grab checks (*)
  f7c5cf1... gtknotebook: Move away from grab_notify (*)
  7627480... gtkspinbutton: Drop grab_notify handler (*)
  df30741... gtkbutton: Drop grab_notify handler (*)
  2f8d5e2... gtkvideo: Track child focus to determine whether controls s (*)
  1f79864... gtkprintoperation-win32: Don't track grab-notify (*)
  994f327... gtkwidget: Drop ::grab-notify signal and vfunc (*)
  ddb3a4b... gtkmain: Make grab-notify notifications more targeted (*)
  1c5cf17... gtkwidget: Drop internal checks in grab-notify (*)
  f046e27... gtkwidget: Drop gtk_widget_device_is_shadowed() (*)
  102d2a3... gtkwidget: Avoid use of shadowed flag (*)
  8e549d7... gtkwidget: Drop _gtk_widget_[gs]et_shadowed() (*)
  8eeef54... gtktextview: Remove child textview items last (*)
  db82eae... Merge branch 'wip/carlosg/input-cleanups' into 'master'

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