[gnome-todo/gnome-3-20] plugin-dialog: fix unstranslated string

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 9bd6d2c2a1db097fbd8a0c981e0c08e994edb7cf
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Thu Apr 21 21:36:53 2016 -0300

    plugin-dialog: fix unstranslated string
    
    The Extensions title of the dialog was not marked for
    translations. This is an obvious bug, don't know why
    I didn't notice it before.

 data/ui/plugin-dialog.ui |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/ui/plugin-dialog.ui b/data/ui/plugin-dialog.ui
index 58867da..79c7891 100644
--- a/data/ui/plugin-dialog.ui
+++ b/data/ui/plugin-dialog.ui
@@ -72,7 +72,7 @@
       <object class="GtkHeaderBar" id="headerbar">
         <property name="visible">True</property>
         <property name="can_focus">False</property>
-        <property name="title">Extensions</property>
+        <property name="title" translatable="yes">Extensions</property>
         <property name="show_close_button">True</property>
         <child>
           <object class="GtkButton" id="back_button">