[shotwell] flatpak: Use dconf GSettings backend

[Jens Georg <jensgeorg src gnome org>]

commit c1dd23d4e49762dc29ae626d0fde279bb58838fc
Author: Jens Georg <mail jensge org>
Date:   Sat Oct 12 04:09:41 2019 +0200

    flatpak: Use dconf GSettings backend

 flatpak/org.gnome.Shotwell.json | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/flatpak/org.gnome.Shotwell.json b/flatpak/org.gnome.Shotwell.json
index 88bce896..2f374a67 100644
--- a/flatpak/org.gnome.Shotwell.json
+++ b/flatpak/org.gnome.Shotwell.json
@@ -26,7 +26,8 @@
         "--talk-name=org.freedesktop.FileManager1",
         "--talk-name=org.gnome.SettingsDaemon",
         "--talk-name=org.gtk.vfs",
-        "--talk-name=org.gtk.vfs.*"
+        "--talk-name=org.gtk.vfs.*",
+        "--env=GSETTINGS_BACKEND=dconf"
     ],
     "cleanup" : [
         "/include",