[gnome-builder] shortcut-ui: document uncomment/comment shortcuts

[Christian Hergert <chergert src gnome org>]

commit cba5ffa13e7acacc658fdbedacb404bbabfdf82c
Author: Mathieu PATUREL <australie p gmail com>
Date:   Thu Aug 20 10:14:10 2020 +1000

    shortcut-ui: document uncomment/comment shortcuts
    
    https://gitlab.gnome.org/GNOME/gnome-builder/-/issues/1285

 src/libide/gui/ide-shortcuts-window.ui | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
---
diff --git a/src/libide/gui/ide-shortcuts-window.ui b/src/libide/gui/ide-shortcuts-window.ui
index 9cb451bce..ab9f9c973 100644
--- a/src/libide/gui/ide-shortcuts-window.ui
+++ b/src/libide/gui/ide-shortcuts-window.ui
@@ -370,6 +370,20 @@
                 <property name="subtitle" translatable="yes" context="shortcut window">Requires semantic 
language support</property>
               </object>
             </child>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">true</property>
+                <property name="accelerator">&lt;ctrl&gt;m</property>
+                <property name="title" translatable="yes" context="shortcut window">Comment code</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">true</property>
+                <property name="accelerator">&lt;ctrl&gt;&lt;shift&gt;m</property>
+                <property name="title" translatable="yes" context="shortcut window">Uncomment code</property>
+              </object>
+            </child>
           </object>
         </child>
         <child>