[gtk] (2 commits) ...Merge branch 'wip/jimmac/menu-styling-adjustments' into 'master'

From: Matthias Clasen <matthiasc src gnome org>
To: commits-list gnome org
Cc:
Subject: [gtk] (2 commits) ...Merge branch 'wip/jimmac/menu-styling-adjustments' into 'master'
Date: Wed, 13 May 2020 17:19:20 +0000 (UTC)

Summary of changes:

  69ee1e1... Adwaita: use thinner arrows for navigation
  4ed062e... Merge branch 'wip/jimmac/menu-styling-adjustments' into 'ma