[gnome-builder] ide-gui: Add "show document outline" to shortcuts window

[Christian Hergert <chergert src gnome org>]

commit 4f810c10bb4ef21a24bf5c26c4ddc7cb6bdc699d
Author: vanadiae <vanadiae35 gmail com>
Date:   Fri Aug 13 13:12:06 2021 +0200

    ide-gui: Add "show document outline" to shortcuts window
    
    It wasn't there so there was no way of knowing the shortcut existed.

 src/libide/gui/ide-shortcuts-window.ui | 7 +++++++
 1 file changed, 7 insertions(+)
---
diff --git a/src/libide/gui/ide-shortcuts-window.ui b/src/libide/gui/ide-shortcuts-window.ui
index 36a987b06..f1ad3f68b 100644
--- a/src/libide/gui/ide-shortcuts-window.ui
+++ b/src/libide/gui/ide-shortcuts-window.ui
@@ -185,6 +185,13 @@
                 <property name="title" translatable="yes" context="shortcut window">Show list of open 
documents</property>
               </object>
             </child>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">true</property>
+                <property name="accelerator">&lt;ctrl&gt;&lt;shift&gt;k</property>
+                <property name="title" translatable="yes" context="shortcut window">Show document outline or 
symbol tree</property>
+              </object>
+            </child>
           </object>
         </child>
         <child>