[gnome-builder] gui: Add Beautify shortcut to shortcuts window

[Christian Hergert <chergert src gnome org>]

commit 25eb3a4ecdac5155fd8070e8bb2e102e7ba33565
Author: vanadiae <vanadiae35 gmail com>
Date:   Fri Mar 19 17:13:51 2021 +0100

    gui: Add Beautify shortcut to shortcuts window
    
    The Ctrl+Alt+B shorcut existed for a while, but it was documented
    nowhere, so this commit adds it to the shortcuts window.

 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 958e75dba..f79247a38 100644
--- a/src/libide/gui/ide-shortcuts-window.ui
+++ b/src/libide/gui/ide-shortcuts-window.ui
@@ -391,6 +391,13 @@
                 <property name="title" translatable="yes" context="shortcut window">Uncomment code</property>
               </object>
             </child>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">true</property>
+                <property name="accelerator">&lt;ctrl&gt;&lt;alt&gt;b</property>
+                <property name="title" translatable="yes" context="shortcut window">Beautify selected 
code</property>
+              </object>
+            </child>
           </object>
         </child>
         <child>