[alacarte] Mark a missing string for translation

[Piotr Drąg <piotrdrag src gnome org>]

commit aa8e44f603ac5b44eabf1299affe0573be5b966d
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Tue Nov 7 04:36:11 2017 +0100

    Mark a missing string for translation
    
    https://bugzilla.gnome.org/show_bug.cgi?id=789996

 data/alacarte.ui |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/alacarte.ui b/data/alacarte.ui
index 90941a6..ef6be02 100644
--- a/data/alacarte.ui
+++ b/data/alacarte.ui
@@ -70,7 +70,7 @@
             </child>
             <child>
               <object class="GtkButton" id="restore_button">
-                <property name="label">Restore System Configuration</property>
+                <property name="label" translatable="yes">Restore System Configuration</property>
                 <property name="visible">True</property>
                 <property name="can_focus">True</property>
                 <property name="can_default">True</property>