[geary/wip/close-flatpak-settings-hole] Close Flatpak settings hole

[Michael Gratton <mjog src gnome org>]

commit d1d7485434f08ee58925c34525a3a2b5d382b447
Author: Michael Gratton <mike vee net>
Date:   Thu Aug 29 00:53:49 2019 +1000

    Close Flatpak settings hole
    
    See https://blogs.gnome.org/mclasen/2019/07/12/settings-in-a-sandbox-world/

 org.gnome.Geary.json | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)
---
diff --git a/org.gnome.Geary.json b/org.gnome.Geary.json
index 6044c795..84ed6646 100644
--- a/org.gnome.Geary.json
+++ b/org.gnome.Geary.json
@@ -53,9 +53,8 @@
         "--talk-name=org.gnome.evolution.dataserver.Sources5",
         "--filesystem=xdg-cache/evolution/addressbook:ro",
 
-        /* Needed for dconf to work */
-        "--filesystem=xdg-run/dconf", "--filesystem=~/.config/dconf:ro",
-        "--talk-name=ca.desrt.dconf", "--env=DCONF_USER_CONFIG_DIR=.config/dconf",
+        /* Migrate GSettings into the sandbox */
+        "--metadata=X-DConf=migrate-path=/org/gnome/Geary/",
 
         /* Let view source keep on working as-sis for now. Bug 779311. */
         "--filesystem=/tmp"