[gnome-boxes] Add Ctrl+question shorcut to the page

[Felipe Borges <felipeborges src gnome org>]

commit c3eb6e88b8cf37079c49b2a4cd1599a46fc6c8f5
Author: Sabri Ünal <libreajans gmail com>
Date:   Wed Jan 22 11:59:50 2020 +0000

    Add Ctrl+question shorcut to the page

 data/ui/kbd-shortcuts-window.ui | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/data/ui/kbd-shortcuts-window.ui b/data/ui/kbd-shortcuts-window.ui
index d4a2687a..f89cc0ac 100644
--- a/data/ui/kbd-shortcuts-window.ui
+++ b/data/ui/kbd-shortcuts-window.ui
@@ -53,7 +53,7 @@
             <child>
               <object class="GtkShortcutsShortcut">
                 <property name="visible">1</property>
-                <property name="accelerator">&lt;Ctrl&gt;F1</property>
+                <property name="accelerator">&lt;Ctrl&gt;F1 &lt;Ctrl&gt;question</property>
                 <property name="title" translatable="yes" context="shortcut window">Keyboard 
shortcuts</property>
               </object>
             </child>