[gnome-control-center/gnome-3-24] keyboard: Discard the added shortcut on Escape

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

commit d9626060c5f7f607c47303108a71f90033825bec
Author: Mohammed Sadiq <sadiq sadiqpk org>
Date:   Tue Feb 21 10:47:15 2017 +0530

    keyboard: Discard the added shortcut on Escape
    
    If the user press Escape key after the user have set some shortcut,
    don't save the newly set shortcut, and close the dialog.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=778748

 panels/keyboard/shortcut-editor.ui |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/panels/keyboard/shortcut-editor.ui b/panels/keyboard/shortcut-editor.ui
index 5e8af7a..4cd4558 100644
--- a/panels/keyboard/shortcut-editor.ui
+++ b/panels/keyboard/shortcut-editor.ui
@@ -9,6 +9,7 @@
     <property name="height_request">300</property>
     <property name="window_position">center</property>
     <property name="type_hint">dialog</property>
+    <signal name="close" handler="cancel_button_clicked_cb" object="CcKeyboardShortcutEditor" swapped="no" />
     <signal name="delete-event" handler="gtk_widget_hide_on_delete" object="CcKeyboardShortcutEditor" 
swapped="yes"/>
     <child internal-child="vbox">
       <object class="GtkBox">