[gtk/gtk-3-24] (2 commits) ...Merge branch 'fix-backdrop-flat-button-styling' into 'gtk-3-24'

From: Matthias Clasen <matthiasc src gnome org>
To: commits-list gnome org
Cc:
Subject: [gtk/gtk-3-24] (2 commits) ...Merge branch 'fix-backdrop-flat-button-styling' into 'gtk-3-24'
Date: Sun, 1 Dec 2019 15:09:36 +0000 (UTC)

Summary of changes:

  f26b9c9... Adwaita: Fix some backdrop flat buttons
  8b78999... Merge branch 'fix-backdrop-flat-button-styling' into 'gtk-3