[gtk: 3/3] Merge branch 'clipboard-demo-fixes' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

commit 796bc9bde18f1b7b3bdc6562bb9b7caa04cb9347
Merge: ae7fd6f129 f8f391ceb9
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Apr 26 02:13:33 2020 +0000

    Merge branch 'clipboard-demo-fixes' into 'master'
    
    Clipboard demo fixes
    
    See merge request GNOME/gtk!1762

 demos/gtk-demo/clipboard.c        | 206 +-----------------------------
 demos/gtk-demo/demo.gresource.xml |   4 +
 demos/gtk-demo/demoimage.c        | 259 ++++++++++++++++++++++++++++++++++++++
 demos/gtk-demo/demoimage.h        |  13 ++
 demos/gtk-demo/meson.build        |   1 +
 gtk/gtkcsswidgetnode.c            |   4 +-
 gtk/gtkroot.c                     | 103 +++++++++++++++
 gtk/gtkrootprivate.h              |   4 +
 gtk/gtkwidget.c                   |   4 +-
 gtk/gtkwindow.c                   | 108 +---------------
 gtk/gtkwindowprivate.h            |   4 -
 11 files changed, 396 insertions(+), 314 deletions(-)
---