[gnome-boxes] app-window: Add shortcut for shortcuts window

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit a3d2a5f429ce6c7765326ae11f4cd636a7833588
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Tue Dec 15 19:39:34 2015 +0000

    app-window: Add shortcut for shortcuts window
    
    Makes sense, doesn't it? :)

 data/ui/kbd-shortcuts-window.ui |    8 ++++++++
 src/app-window.vala             |    5 +++++
 2 files changed, 13 insertions(+), 0 deletions(-)
---
diff --git a/data/ui/kbd-shortcuts-window.ui b/data/ui/kbd-shortcuts-window.ui
index 0aaaa9f..a7c9310 100644
--- a/data/ui/kbd-shortcuts-window.ui
+++ b/data/ui/kbd-shortcuts-window.ui
@@ -44,6 +44,14 @@
             <child>
               <object class="GtkShortcutsShortcut">
                 <property name="visible">1</property>
+                <property name="accelerator">&lt;Ctrl&gt;k</property>
+                <property name="title" translatable="yes">Keyboard shortcuts</property>
+              </object>
+            </child>
+
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">1</property>
                 <property name="accelerator">&lt;Ctrl&gt;q</property>
                 <property name="title" translatable="yes">Close Window/Quit Boxes</property>
               </object>
diff --git a/src/app-window.vala b/src/app-window.vala
index 021948c..f8a0760 100644
--- a/src/app-window.vala
+++ b/src/app-window.vala
@@ -348,6 +348,11 @@ private class Boxes.AppWindow: Gtk.ApplicationWindow, Boxes.UI {
             App.app.activate_action ("help", null);
 
             return true;
+        } else if (event.keyval == Gdk.Key.k &&
+                   (event.state & default_modifiers) == Gdk.ModifierType.CONTROL_MASK) {
+            App.app.activate_action ("kbd-shortcuts", null);
+
+            return true;
         } else if (event.keyval == Gdk.Key.q &&
                    (event.state & default_modifiers) == Gdk.ModifierType.CONTROL_MASK) {
             App.app.quit_app ();