[dconf-editor] Fix non-updating hamburger menu.

[Arnaud B. <arnaudb src gnome org>]

commit c72fee704521b5b873e8fb8c543614b59830eedf
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Sun Jan 20 04:23:18 2019 +0100

    Fix non-updating hamburger menu.
    
    Disappeared in the subclassing stuff. My bad.

 editor/browser-headerbar.vala | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/editor/browser-headerbar.vala b/editor/browser-headerbar.vala
index 627b1ef..c7df05c 100644
--- a/editor/browser-headerbar.vala
+++ b/editor/browser-headerbar.vala
@@ -38,6 +38,8 @@ private abstract class BrowserHeaderBar : BaseHeaderBar, AdaptativeWidget
             current_type_is_config = !current_type_is_config;
             update_properties_view ();
         }
+
+        update_hamburger_menu ();
     }
 
     private bool is_extra_thin = false;