[gnome-flashback] display-config: mark a string for translation

[Piotr Drąg <piotrdrag src gnome org>]

commit 3d2560f1020cfb188b1db17b8d3f9f495df36a3c
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Thu Sep 28 12:52:54 2017 +0200

    display-config: mark a string for translation
    
    Unfortunately, Glade suffers from
    https://bugzilla.gnome.org/show_bug.cgi?id=782753

 data/ui/gf-confirm-display-change-dialog.ui |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/ui/gf-confirm-display-change-dialog.ui b/data/ui/gf-confirm-display-change-dialog.ui
index e32d6af..7ac6467 100644
--- a/data/ui/gf-confirm-display-change-dialog.ui
+++ b/data/ui/gf-confirm-display-change-dialog.ui
@@ -141,7 +141,7 @@
       <object class="GtkHeaderBar">
         <property name="visible">True</property>
         <property name="can_focus">False</property>
-        <property name="title">Confirm Changes</property>
+        <property name="title" translatable="yes">Confirm Changes</property>
         <property name="show_close_button">True</property>
         <child>
           <placeholder/>