[dconf-editor] Add Mate usual mappings.

[Arnaud Bonatti <arnaudb src gnome org>]

commit 0a28ebc03bcc9ffdfd9ac45edd259242c1b52ea0
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Wed Jan 31 16:39:45 2018 +0100

    Add Mate usual mappings.

 editor/dconf-editor.vala |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/editor/dconf-editor.vala b/editor/dconf-editor.vala
index 9f2fb9e..0c2f935 100644
--- a/editor/dconf-editor.vala
+++ b/editor/dconf-editor.vala
@@ -98,7 +98,12 @@ class ConfigurationEditor : Gtk.Application
             {"org.gnome.builder.plugin", "/org/gnome/builder/plugins/todo-plugin/"},
             {"org.gnome.builder.plugin", "/org/gnome/builder/plugins/vala-pack-plugin/"},
             {"org.gnome.builder.plugin", "/org/gnome/builder/plugins/valgrind_plugin/"},
-            {"org.gnome.builder.plugin", "/org/gnome/builder/plugins/xml-pack-plugin/"}
+            {"org.gnome.builder.plugin", "/org/gnome/builder/plugins/xml-pack-plugin/"},
+
+            // https://github.com/mate-desktop/mate-desktop/issues/300
+            {"org.mate.panel.object",              "/org/mate/panel/objects//"},                // of the 
form object-x; see also bug
+            {"org.mate.panel.toplevel",            "/org/mate/panel/toplevels//"},              // of the 
form toplevel-x
+            {"org.mate.panel.toplevel.background", "/org/mate/panel/toplevels//background/"}    // in 
previous dirs
         };  // TODO add more well-known mappings
 
     private static string [] skipped_schemas = {