[dconf-editor] Fix keyboard activation.

[Arnaud Bonatti <arnaudb src gnome org>]

commit cfd2abb9dfd86f91109e951bf5ccbcd30b6276ad
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Sun Feb 11 12:03:07 2018 +0100

    Fix keyboard activation.

 editor/registry-search.vala |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/editor/registry-search.vala b/editor/registry-search.vala
index 1b7d03e..dfde708 100644
--- a/editor/registry-search.vala
+++ b/editor/registry-search.vala
@@ -142,8 +142,7 @@ class RegistrySearch : RegistryList
         if (selected_row == null)
             return false;
 
-        ((ClickableListBoxRow) ((!) selected_row).get_child ()).activate ();
-
+        ((!) selected_row).activate ();
         return true;
     }