[gtk: 11/11] Merge branch 'overlay-cleanup' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

commit 41c0ac1a68a7203df45f49ee5feca41eb05fcf39
Merge: e8b5056940 4e97417efa
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Feb 22 03:38:20 2019 +0000

    Merge branch 'overlay-cleanup' into 'master'
    
    Overlay cleanup
    
    See merge request GNOME/gtk!600

 demos/gtk-demo/bluroverlay.c          | 482 ++++++++++++++++++++++++++++++++++
 demos/gtk-demo/bluroverlay.h          |  65 +++++
 demos/gtk-demo/demo.gresource.xml     |   1 +
 demos/gtk-demo/meson.build            |   2 +-
 demos/gtk-demo/overlay.c              |   2 +-
 demos/gtk-demo/overlay2.c             |   8 +-
 demos/gtk-demo/transparent.c          |   9 +-
 docs/reference/gtk/gtk4-sections.txt  |   5 +-
 docs/reference/gtk/migrating-3to4.xml |   9 +
 gtk/gtkoverlay.c                      | 288 +-------------------
 gtk/gtkoverlay.h                      |   4 -
 gtk/gtkwidget.c                       |  38 ++-
 gtk/gtkwidget.h                       |   7 +
 gtk/gtkwidgetprivate.h                |   6 +-
 tests/testoverlay.c                   | 130 +--------
 15 files changed, 609 insertions(+), 447 deletions(-)
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