[dconf-editor] Fix a non-closing popover.

[Arnaud B. <arnaudb src gnome org>]

commit f87496834a7615bea6df1715b541ca98e3059439
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Thu Nov 29 08:25:57 2018 +0100

    Fix a non-closing popover.

 editor/dconf-window.vala | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/editor/dconf-window.vala b/editor/dconf-window.vala
index 9836aee..53896b7 100644
--- a/editor/dconf-window.vala
+++ b/editor/dconf-window.vala
@@ -1681,7 +1681,9 @@ private class DConfWindow : AdaptativeWindow, AdaptativeWidget
         if (headerbar.search_mode_enabled)
             return;
 
+        headerbar.close_popovers ();        // by symmetry with go_forward()
         browser_view.discard_row_popover ();
+
         if (current_path == "/")
             return;
         if (shift)
@@ -1697,7 +1699,9 @@ private class DConfWindow : AdaptativeWindow, AdaptativeWidget
 
         string complete_path = headerbar.get_complete_path ();
 
+        headerbar.close_popovers ();
         browser_view.discard_row_popover ();
+
         if (current_path == complete_path)  // TODO something?
             return;