[gnome-clocks] Fix incorrect accelerator for quit in help overlay

[Robert Ancell <rancell src gnome org>]

commit e5d3794f58bb6ac023fb4e60471f769d3ed2cca1
Author: Robert Ancell <robert ancell canonical com>
Date:   Thu Jun 22 16:33:55 2017 +1200

    Fix incorrect accelerator for quit in help overlay

 data/gtk/help-overlay.ui |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/gtk/help-overlay.ui b/data/gtk/help-overlay.ui
index f0dba56..289b030 100644
--- a/data/gtk/help-overlay.ui
+++ b/data/gtk/help-overlay.ui
@@ -29,7 +29,7 @@
             <child>
               <object class="GtkShortcutsShortcut">
                 <property name="visible">1</property>
-                <property name="accelerator">&lt;alt&gt;Q</property>
+                <property name="accelerator">&lt;ctrl&gt;Q</property>
                 <property name="title" translatable="yes" context="shortcut window">Quit</property>
               </object>
             </child>