[gnome-boxes] app-window: Drop alt+a kbd shortcut

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit ec60b406903b9bb604f40a51434d01d69011e732
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Mon Dec 14 19:51:58 2015 +0000

    app-window: Drop alt+a kbd shortcut
    
    We already support alt+q for quitting the UI and it's well-known, there
    is no reason to have two shortcuts for the same thing. So let's just
    drop alt+a shortcut. Relevant IRC discussion:
    
    <aday>    zeenix: why Alt+A for quit?
    <mclasen> aday: A für Aufhören!
    <mclasen> or maybe a for abort
    <aday>    zeenix: but you already have ctrl+q. why do you need alt+a too?
    <zeenix>  aday: i guess idea was to add support for all known key combos
    <aday>    zeenix: i didn't know that alt+a was known... not sure why
              you'd need two combos for the same action
    <aday>    zeenix: i'd try and avoid duplicating shortcuts in the
              shortcuts window.

 data/ui/kbd-shortcuts-window.ui |    4 ++--
 src/app-window.vala             |    5 -----
 2 files changed, 2 insertions(+), 7 deletions(-)
---
diff --git a/data/ui/kbd-shortcuts-window.ui b/data/ui/kbd-shortcuts-window.ui
index 73f455c..bb1a2a4 100644
--- a/data/ui/kbd-shortcuts-window.ui
+++ b/data/ui/kbd-shortcuts-window.ui
@@ -44,7 +44,7 @@
             <child>
               <object class="GtkShortcutsShortcut">
                 <property name="visible">1</property>
-                <property name="accelerator">&lt;Ctrl&gt;q &lt;Alt&gt;a</property>
+                <property name="accelerator">&lt;Ctrl&gt;q</property>
                 <property name="title" translatable="yes">Close Window/Quit Boxes</property>
               </object>
             </child>
@@ -142,7 +142,7 @@
             <child>
               <object class="GtkShortcutsShortcut">
                 <property name="visible">1</property>
-                <property name="accelerator">&lt;Ctrl&gt;q &lt;Alt&gt;a</property>
+                <property name="accelerator">&lt;Ctrl&gt;q</property>
                 <property name="title" translatable="yes">Close window/Quit Boxes</property>
               </object>
             </child>
diff --git a/src/app-window.vala b/src/app-window.vala
index 08e2e92..021948c 100644
--- a/src/app-window.vala
+++ b/src/app-window.vala
@@ -363,11 +363,6 @@ private class Boxes.AppWindow: Gtk.ApplicationWindow, Boxes.UI {
             topbar.click_search_button ();
 
             return true;
-        } else if (event.keyval == Gdk.Key.a &&
-                   (event.state & default_modifiers) == Gdk.ModifierType.MOD1_MASK) {
-            App.app.quit_app ();
-
-            return true;
         } else if (((direction == Gtk.TextDirection.LTR && // LTR
                      event.keyval == Gdk.Key.Left) ||      // ALT + Left -> back
                     (direction == Gtk.TextDirection.RTL && // RTL